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  • [PDF] Numerical simulation of airflow around buildings ...

    Computational Fluid Dynamics (CFD) is a commonly accepted tool for studying the wind flow over complex terrain and buildings. But an accurate prediction of the flow field implies a correct reproduction of the turbulent quantities and consequently the right choice of the turbulence model. Due to the highly dissipative behavior of the RANS based turbulence models they are not able to trigger ...

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  • Numerical Simulation of Airflow and Ellipsoidal Particle ...

    2018-10-24 · Kiasadegh, M, Abouali, O, Emdad, H, & Ahmadi, G. 'Numerical Simulation of Airflow and Ellipsoidal Particle Deposition in Human Upper Respiratory Tract.' Proceedings of the ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting.

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  • Numerical simulation of a falling droplet surrounding by ...

    Numerical simulation of a falling droplet surrounding by air under electric field using VOF method: A CFD study. ... The VOF method has been employed to model the two-phase flow of the present study. Various capillary numbers are investigated to analyze the effects of …

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  • Numerical Simulation of Fires in Ventilated Compartment ...

    This study is the analytical investigation of transient flow characteristics in a ventilated compartment fire. This study aims at enhancing the understanding of fire propagation in the compartment and its influence on the air flow characteristics. The present paper discusses the results of different ventilation scenarios for a single fire scenario.

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  • Numerical simulation of the internal flow field of a new ...

    2015-2-6 · Numerical simulation of the internal flow field of a new main nozzle in an air-jet loom based on Fluent Liang Chen, Zhi-hua Feng, Teng-zhong Dong, Wei-hua Wang, and Shuai Liu Textile Research Journal 2015 85 : 15 , 1590-1601

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  • Numerical Analysis of Air-Flow Press Molding Using ...

    Numerical simulation was performed to predict the behavior of the sand particles during the air-flow stage, and laboratory experiments were carried out to examine the calculated results. From the simulation, contact force, drag force and inertia force of individual particles were obtained as the function of time.

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  • Simulation of indoor harmful gas dispersion and airflow ...

    2021-3-19 · An LBM-LES modeling framework for turbulent flow simulation has been extended to indoor airflow and pollutant gas dispersion in buildings. The results of the LBM-LES model match those of published experimental and numerical studies and can correctly simulate the indoor airflow and harmful gas behavior.

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  • A Computational Fluid Dynamics Simulation of Oil–Air

    2016-9-8 · A volume of fluid (VOF) computational fluid dynamics (CFD) approach is applied. A sector of a ball bearing is modeled with a fine mesh, and the detailed simulations show the flow behavior for different oil splits to the three feed locations of the bearing, thus providing information useful to understanding oil shedding into the bearing chambers.

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  • Numerical Simulation of a Multistage Radial Inflow Turbine ...

    Aerodynamic performances of a three–stage radial inflow turbine are investigated with numerical simulation. Detailed flow fields, flow patterns, such as secondary flows etc. in the radial turbine impeller are presented and discussed in this paper.

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  • System Simulation Software - ESI Group

    SimulationX is a sophisticated platform to efficiently model, simulate, and analyze mechanical, hydraulic, pneumatic, electrical, and combined systems. From the concept to detailed development to virtual tests, obtain reliable results on the physical behavior quickly and efficiently. The lumped element simulation method enables you to model and ...

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  • Numerical simulation of three-dimensional airflow in a ...

    2016-11-16 · The numerical simulation can provide insights on airflow studies and some guidelines for future prototyping and experiments to further improve the new design. Keywords dual-feed rotor spinning box , standard k-ɛ turbulence model , internal airflow , three-dimensional numerical simulation

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  • Numerical simulation of the flow and erosion behavior of ...

    2020-2-5 · Qili, W., Binbin, J., Mingquan, Y. et al. Numerical simulation of the flow and erosion behavior of exhaust gas and particles in polysilicon reduction furnace. Sci Rep 10, 1909 (2020). https://doi ...

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  • Numerical Simulation of Liquid Water and Air Flow in ...

    2009-8-24 · Tabe, Y, Kibo, K, Kikuta, K, Chikahisa, T, & Kozakai, M. 'Numerical Simulation of Liquid Water and Air Flow in Separator-Channels in PEM Fuel Cell Using LBM.' Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference.

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  • NUMERICAL SIMULATION OF THE INCOMPRESSIBLE TURBULENT FLOW ...

    The present work deals with the 2D numerical simulation of turbulent flow of a binary mixture (air-water vapor) aiming to study some aspects of the convective drying process. The numerical scheme applied by the authors was originally proposed for solving turbulent Newtonian flows (Zdanski et al. 2004).

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  • Numerical simulation of transient flows in a vacuum ...

    2010-7-1 · Numerical simulation of transient flows in a vacuum ejector-diffuser system V Lijo, H D Kim, G Rajesh, and T Setoguchi Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 2010 224 : 7 , 777-786

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  • Numerical study on aerodynamic characteristics of high ...

    Berlitz T., Matschke G. Interior air flow simulation in railway rolling stock. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Vol. 216, Issue 4, 2002, p. 231-236. Zhang D. C., Weng P. F. Numerical simulation of airflow and temperature fields in railway occupied passenger car. Chinese Journal ...

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  • A Theoretical and Numerical Study of Turbulent Wind-Wave ...

    The present understanding of the fundamental flow dynamics underlying wind-wave interactions is far from enough due to our limited knowledge of turbulence stress in the wind field. However, using the large-eddy simulation (LES) of airflow over water waves and linear analysis, we discover that in certain scenarios, the interactions between ...

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  • Numerical analysis on aerodynamic behavior of high-speed ...

    Wang Xiao Ying Numerical analysis on aerodynamic behavior of high-speed trains in the tunnel and open air based on the virtual reality technology. Journal of Vibroengineering, Vol. …

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  • Numerical Simulation of Natural Convection in Stationary ...

    2008-11-24 · Similar simulations for the rotating annulus also show good agreement with measured heat transfer rates. The CFD results confirm Bohn et al’s results, showing reduced heat transfer and a different Rayleigh number dependency compared to gravity-driven flow. Large scale flow structures are found to occur, at all Rayleigh numbers considered.

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  • Flow Illustrator – Easy to use flow simulation tool

    Flow Illustrator is an easy to use online tool to create your own flow simulation videos showing the fluid flow (air, water, etc.) past an object, such as a car, for example. The resulting videos can be used for educational purposes, presentations and recreation. …

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  • Numerical simulation of airflow characteristics in the ...

    2018-8-15 · Results obtained are as follows: High-speed air jetted through the starting nozzles into the yarn duct in the circumferential direction causes a swirl flow in the yarn duct and a negative pressure region near the center axis of the yarn duct. Hence, air and fibers at the fiber inlet are sucked through the processing duct into the yarn duct.

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  • Numerical simulation of the flow and erosion behavior of ...

    2020-2-5 · Qili, W., Binbin, J., Mingquan, Y. et al. Numerical simulation of the flow and erosion behavior of exhaust gas and particles in polysilicon reduction furnace. Sci Rep 10, 1909 (2020). https://doi ...

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  • Numerical Simulation of Airborne Salt Particle Behavior in ...

    2021-5-24 · The flow fields around the device were accurately reproduced using the porous media model, which considered both the tangential and normal resistances of the gauze. This result suggests that the tangential resistance must be considered in the porous media model when the porosity of an object is small, even if the thickness is small.

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  • Direct numerical simulation of the turbulent flow ...

    2021-3-8 · Time-varying exhaled velocity and buoyancy due to temperature differences between the cough and the ambient air affect the overall flow dynamics. The direct numerical simulation (DNS) of an idealized isolated cough is used to characterize the jet/puff dynamics using the trajectory of the leading turbulent vortex ring and extract its topology by ...

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  • Numerical Simulation and the Underlying Mechanism of a ...

    2021-4-19 · 2.2 Numerical Simulation 2.2.1 Setup of Numerical Experiments. The Advanced Research Weather Research and Forecasting (WRF) model, version 3.9 (Skamarock et al., 2008), was used to simulate the hail-producing convective system. The grid configuration is shown in Figure 3 and the model setups are summarized in Table 1.

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  • Numerical Simulations of Island Effects on Airflow and ...

    2010-6-1 · The resulting negative temperature gradient between the warm leeslope air and the colder air downstream then leads to the flow reversal in the lee. Leopold (1949) showed that for mountains with tops well above the trade wind inversion (~2 km in Hawaii), the inversion serves as a lid forcing the low-level flow to be deflected by the terrain ...

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  • Numerical Analysis of Air-Flow Press Molding Using ...

    Numerical simulation was performed to predict the behavior of the sand particles during the air-flow stage, and laboratory experiments were carried out to examine the calculated results. From the simulation, contact force, drag force and inertia force of individual particles were obtained as the function of time.

    Get Price
  • Simulation of indoor harmful gas dispersion and airflow ...

    2021-3-19 · An LBM-LES modeling framework for turbulent flow simulation has been extended to indoor airflow and pollutant gas dispersion in buildings. The results of the LBM-LES model match those of published experimental and numerical studies and can correctly simulate the indoor airflow and harmful gas behavior.

    Get Price
  • Numerical Modelling of the Aeroacoustic and Flow

    2020-9-25 · In this paper, the acoustic behaviour of chip fans is characterised by measuring the sound pressure levels at different speeds when running idle. In addition, the aeroacoustic and flow behaviour of chip turbines is numerically modelled with a Computational Fluid Dynamic (CFD) simulation.

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  • Research - Zhang - MME - Western University

    2021-8-3 · Modeling of turbulence and flow dynamics of gas-solid and liquid-solid two-phase flows in fluidized beds. Numerical and experimental studies of NOx and soot reduction in diesel engines Modeling of fluid flow in fixed beds. Numerical study of the flow behavior of air and powder inside a powder spray booth for coating purpose.

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  • Numerical simulation of airflow characteristics in the ...

    2018-8-15 · Results obtained are as follows: High-speed air jetted through the starting nozzles into the yarn duct in the circumferential direction causes a swirl flow in the yarn duct and a negative pressure region near the center axis of the yarn duct. Hence, air and fibers at the fiber …

    Get Price
  • Numerical Simulation of Thermal-Hydrodynamic Behavior ...

    The present study is aimed to predict and visualize the thermal-hydrodynamic behavior for airflow under inclined roof of the solar air collector, SAC. Three-dimensional of the SAC model using the re-normalization group, RNG, k−e turbulence viscus model is simulated. The simulation was carried out by using ANSYS-FLUENT 14.5. The simulation ...

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  • Numerical Simulations of Island Effects on Airflow and ...

    2010-6-1 · The resulting negative temperature gradient between the warm leeslope air and the colder air downstream then leads to the flow reversal in the lee. Leopold (1949) showed that for mountains with tops well above the trade wind inversion (~2 km in Hawaii), the inversion serves as a lid forcing the low-level flow to be deflected by the terrain ...

    Get Price
  • Numerical simulation of the relationship between ...

    In order to study the relationship between an underwater shock wave and jet thrust oscillation, a simulation model of underwater jet is established. As per a numerical calculation based on the SST (Shear Stress Transport), and VOF (Volume of Fluid) models, the flow speed of jet …

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  • Numerical simulation of high inertial liquid-in-gas droplet in

    2017-10-16 · The behavior of the unstable jetting flow regime cannot be characterized due to the effect of high inertial air flow on the water stream. The results show that droplet size increases as Ca and Re numbers increase and decrease, respectively.

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  • Research - Zhang - MME - Western University

    2021-8-3 · Modeling of turbulence and flow dynamics of gas-solid and liquid-solid two-phase flows in fluidized beds. Numerical and experimental studies of NOx and soot reduction in diesel engines Modeling of fluid flow in fixed beds. Numerical study of the flow behavior of air and powder inside a …

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  • A numerical study of the aerosol behavior in intra-acinar ...

    2020-10-6 · The airflow in G17, G18, and G23 is solved for these inspiration flow rates, assuming a parabolic air velocity profile at the model entrance. All the calculations were conducted as double-precision to more accurately determine the airflow and the particle behavior.

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  • NUMERICAL ANALYSIS OF BUTTERFLY VALVE

    2009-7-20 · butterfly valve, numerical simulation, flow coefficient, hydrodynamic torque coefficient 1. Introduction A butterfly valve (Fig. 1) is a type of flow control device that controls the flow of gas or liquid in a variety of process. It consists of a metal circular disc with its pivot axes at right angles to the direction of flow in the

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  • Numerical Analysis of Airway Mucus Clearance Effectiveness ...

    2020-2-6 · The numerical simulations are conducted using ANSYS 17.0. ... that of water because of the high airflow produced in cough behavior. ... aerosol on the air flow dynamics of the maximal voluntary ...

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  • CFD fire simulation of the Swissair flight 111 in-flight ...

    2016-2-3 · In Part 1, the numerical analyses to pre-fire airflow patterns within the cockpit and its vicinity are presented. The pre-fire simulations serve two ends. One is to provide insight into the flow patterns within the cockpit and its vicinity and further supportive numerical evidence for the airflow flight test observations.

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  • DOISerbia - Numerical investigation on flow behavior and ...

    Rahbar, Nader; Taherian, Mohsen; Shateri, Mostafa; Valipour, Sadegh Mohammad - Numerical investigation on flow behavior and energy separation in a micro-scale vortex tube - Thermal Science

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  • Fluid Flow & Flow Analysis Software

    CFD simulation software in action. See how Autodesk CFD provides the ability to predict and validate fluid flow performance indicators accurately and easily regardless of your CAD system. Watch this choke valve video demonstration to see how upfront CFD results are used to make informed product design decisions. WATCH VIDEO (10:08 MIN.)

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  • Flow Simulation

    Capabilities. Embedded CFD simulation for fluid flow and heat transfer analysis. FLOEFD for Solid Edge is especially well-suited for use during the design process as it reduces overall time to a solution by as much a 65-75 percent compared to other CFD tools.

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  • Numerical Investigation of Flame Flashback Into Swirling Flow

    2009-8-3 · Tangermann, E, & Pfitzner, M. 'Numerical Investigation of Flame Flashback Into Swirling Flow.' Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea, and Air . Volume 3: Combustion, Fuels and Emissions, Parts A and B .

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  • Three-Dimensional Numerical Simulation of Multi-phase Flow ...

    Powder injection molding filling process was considered as a powder,binder and air multi-phase flow process.The multi-phase flow governing equations of powder injection molding filling process were given.According to the actual parameters of iron powder injection molding filling process for intricate parts clamp,the initial and boundary conditions of the governing equations were determined.A ...

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  • Thermal Analysis and Optimization of Gearboxes by Simulation

    To raise the air velocity of surface-cooled gearboxes, using fans is a common solution. Mounted to the fast rotating input shaft, a high-volume flow rate is generated to pass the surface; sometimes, cooling fins are added to enlarge the surface area. Figure 4 shows a Flender B3SH gearbox with fan and air …

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  • Experimental and Numerical Investigation of a Subsonic ...

    2008-9-19 · The numerical results agreed well with experimental results. Detailed analyses of the coupled flow through bend skewed slot casing treatment and rotor blade passage under subsonic conditions led to some preliminary conclusions as to the flow physics involved in the stall margin improvements afforded by the use of bend skewed slot casing treatment.

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  • Steady-State Modeling of Gas Turbine Engines Using the ...

    2010-12-22 · Current practices in industry and academia will also be discussed. While NPSS allows both steady-state and transient simulations and is written to facilitate higher orders of analysis fidelity, the pedagogical example will focus primarily on steady-state analysis of an aircraft mixed flow turbofan at the 0-D and 1-D level.

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  • Multiphase Flow: Theory and Applications - Google Books

    The selected papers contained in this book present the latest research in one of the most challenging, yet most universally applicable areas of technology. Multiphase flows are found in all areas of technology and the range of related problems of interest is vast, including many areas of science and engineering.Recently multiphase fluid dynamics have generated a great deal of attention ...

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  • Numerical approximation - definition of Numerical ...

    Numerical approximation synonyms, Numerical approximation pronunciation, Numerical approximation translation, English dictionary definition of Numerical approximation. n. The study of approximation techniques for solving mathematical problems, taking into account the extent of possible errors.

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  • Numerical simulation of self-sustained oscillation of a ...

    2003-3-20 · Surgical removal of the larynx results in radically reduced production of voice and speech. To improve voice quality a voice-producing element (VPE) is developed, based on the lip principle, called...

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  • Numerical simulations of fluid-structure interactions in ...

    2007-10-9 · Most single-reed woodwind instrument models rely on a quasistationary approximation to describe the relationship between the volume flow and the pressure difference across the reed channel. Semiempirical models based on the quasistationary approximation are very useful in explaining the fundamental characteristics of this family of instruments such as self-sustained oscillations and …

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  • Simulation of Atmospheric Microbursts Using a Numerical ...

    2020-2-5 · The simulation displays a general wind flow similar to the conditions described by Wakimoto and Bringi , and the 0 °C level is close to the observed level at 550 hPa. Although Kingsmill and Wakimoto ( 1991 ) show the reflectivity core reaching higher …

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  • SOLIDWORKS Flow Simulation - Computational Fluid

    Computational Fluid Dynamics or CFD is a technique that deals with the solution of fluid flow fields through numerical analysis. SOLIDWORKS Flow Simulation is a CFD software designed for the everyday SOLIDWORKS user and analyst. It provides dynamic feedback on the fluid flow and thermal performance of their products.

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  • NUMERICAL ANALYSIS OF BUTTERFLY VALVE

    2009-7-20 · butterfly valve, numerical simulation, flow coefficient, hydrodynamic torque coefficient 1. Introduction A butterfly valve (Fig. 1) is a type of flow control device that controls the flow of gas or liquid in a variety of process. It consists of a metal circular disc with its pivot axes at right angles to the direction of flow …

    Get Price
  • Development of a Computational Model to Visualize Air Flow ...

    2018-1-10 · For model validation, the numerical results are compared to spatial data extracted from high speed video recorded during experiments matching key model parameters. Comparisons of the numerical and experimental results indicate that the model is providing reasonable results for the deformations and overall air flow.

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  • Experimental and numerical study of spouted bed fluif

    The numerical simulation technique and computational fluid dynamics (CFD) studies have become popular in the field of gas-solid two-phase flow. Studies on fluidized beds and spouted beds can be mentioned as examples. Numerical simulation is a useful tool to obtain detailed information about flow phenomena without disturbing them.

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  • Thermal Behavior of Lithium Ion Battery Packs

    2017-5-9 · Thermal Behavior of Lithium Ion Battery Packs Hongwen He 1,2, Hui Jia 1,2, ... Simulation and numerical results for the proposed ... The air flow rate varies dramatically in the outlet, and easily forms a vortex, going against the flow diffusion. Figure 2. Distribution of the velocity vectors and isothermal curves at the rate of 1.0 m/s.

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  • Transaction of the Japan Society for Simulation Technology

    There had been a service stop from Jul 2, 2017, 8:06 to Jul 2, 2017, 19:12(JST) (Jul 1, 2017, 23:06 to Jul 2, 2017, 10:12(UTC)) . The service has been back to normal.We apologize for any inconvenience this may cause you. May 18, 2016 We have released “J-STAGE BETA site”. May 01, 2015 Please note the 'spoofing mail' that pretends to be J-STAGE.

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  • TsAGI Science Journal, Volumen 51, 2020, Edición 2 ...

    investigation of high-temperature zones formed in supersonic air flow when injecting combustion gases and oxygen in ... numerical simulation of a plane ejector with streamwise displacement of ... doi: 10.1615/tsagiscij.2020034895. behavior of a flat composite four-stringer panel with internal damages under unsteady impact aleksandr ...

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