scholarly journals Comparison of RANS and scale-resolving approaches when modelling the turbulent flow behind a bluff body

2019 ◽  
Vol 196 ◽  
pp. 00036
Author(s):  
Svetlana V. Pogudalina ◽  
Natalya N. Fedorova ◽  
Svetlana A. Valger
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Calculation ◽  
Turbulent Flow ◽  
Bluff Body ◽  
Air Flow ◽  
Ansys Fluent ◽  
Fluent Software

In this paper, the results of a numerical simulation of the air flow in the vicinity of a parallelepiped fixed on a plate are presented. The 3D calculations were performed with the ANSYS Fluent software using scale-resolving DES approach. The obtained results are compared with the experimental data and with the results of the previous numerical calculation.

scholarly journals Numerical Modelling Of Humid Air Flow Around A Porous Body

2015 ◽  
Vol 9 (3) ◽  
pp. 161-166
Author(s):  
Aneta Bohojło-Wiśniewska
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Porous Medium ◽  
Numerical Modelling ◽  
Chinese Cabbage ◽  
Air Flow ◽  
Transfer Model ◽  
Humid Air ◽  
Ansys Fluent ◽  
Complex Heat Transfer

Summary This paper presents an example of humid air flow around a single head of Chinese cabbage under conditions of complex heat transfer. This kind of numerical simulation allows us to create a heat and humidity transfer model between the Chinese cabbage and the flowing humid air. The calculations utilize the heat transfer model in porous medium, which includes the temperature difference between the solid (vegetable tissue) and fluid (air) phases of the porous medium. Modelling and calculations were performed in ANSYS Fluent 14.5 software.

scholarly journals NUMERICAL SIMULATION OF AIRFLOW AROUND VEHICLE MODELS

2018 ◽  
Vol 56 (3) ◽  
pp. 370
Author(s):  
Nguyen Van Thang ◽  
Ha Tien Vinh ◽  
Bui Dinh Tri ◽  
Nguyen Duy Trong
Keyword(s):  
Numerical Simulation ◽  
Kinetic Energy ◽  
Three Dimensional ◽  
Aerodynamic Characteristics ◽  
Aerodynamic Forces ◽  
Dissipation Energy ◽  
Ansys Fluent ◽  
Car Model ◽  
Airflow Field ◽  
Fluent Software

This article carries out the numerical simulation of airflow over three dimensional car models using ANSYS Fluent software. The calculations have been performed by using realizable k-e turbulence model. The external airflow field of the simplified BMV M6 model with or without a wing is simulated. Several aerodynamic characteristics such as pressure distribution, velocity contours, velocity vectors, streamlines, turbulence kinetic energy and turbulence dissipation energy are analyzed in this study. The aerodynamic forces acting on the car model is calculated and compared with other authors.

An Evaluation of Drag Coefficient of Wind Turbine System Installed on Moving Car

2014 ◽  
Vol 660 ◽  
pp. 689-693 ◽  
Author(s):  
Mohd Sofian ◽  
Rosly Nurhayati ◽  
A.Jamit Rexca ◽  
S. Shamsudin Syariful ◽  
Abdullah Aslam
Keyword(s):  
Drag Coefficient ◽  
Wind Turbine ◽  
Air Flow ◽  
Aerodynamic Performance ◽  
Ansys Fluent ◽  
Car Body ◽  
Wind Turbine System ◽  
Fluent Software ◽  
Suitable Area

This study presents a simulation result of an evaluation of the aerodynamic performance of a moving car with a wind turbine system. Sedan type cars (approaching the size of Proton Wira car) were modeled using the SolidWork software and simulation was done by ANSYS FLUENT software. Three car models with different wind turbine system positions (in front of the front bumper, on top of the hood and on top of the roof) plus one model without the wind turbine system were simulated. The study proved that the position of the wind turbine system installation will change the characteristic of the air flow around the car body and affects the aerodynamic performance of the car. Extended front bumper of a car is not significantly affecting the aerodynamic performance of the car. This extended bumper seems to be the suitable area to install a wind turbine system and the investigation shows that the aerodynamic performance of the car improved due to lower drag coefficient, Cd..

scholarly journals Direct Numerical Simulation of separated turbulent flow in axisymmetric diffuser

2021 ◽  
Vol 2103 (1) ◽  
pp. 012214
Author(s):  
A S Stabnikov ◽  
D K Kolmogorov ◽  
A V Garbaruk ◽  
F R Menter
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Turbulent Flow ◽  
Turbulence Model ◽  
Eddy Viscosity ◽  
Separated Flow ◽  
Model Improvement ◽  
Good Agreement

Abstract Direct numerical simulation (DNS) of the separated flow in axisymmetric CS0 diffuser is conducted. The obtained results are in a good agreement with experimental data of Driver and substantially supplement them. Along with other data, eddy viscosity extracted from performed DNS could be used for RANS turbulence model improvement.

scholarly journals Collecting finely-dispersed particles from the gas flow in a centrifugal separator with coaxially arranged pipes

2020 ◽  
Vol 315 ◽  
pp. 03003
Author(s):  
Vadim E. Zinurov ◽  
Oksana S. Dmitrieva ◽  
Oksana S. Popkova
Keyword(s):  
Numerical Simulation ◽  
Pressure Loss ◽  
Software Package ◽  
Gas Flow ◽  
Scientific Paper ◽  
Centrifugal Separator ◽  
Centrifugal Forces ◽  
Ansys Fluent ◽  
Dispersed Particles ◽  
Fluent Software

The article deals with the problem of increasing the efficiency of dedusting the gas flow from the finely dispersed particles smaller than 10 μm. In order to solve this problem, a design of centrifugal separator with coaxially arranged pipes is proposed. The described principle of operation includes the large values of centrifugal forces, which take place inside the device when the flow is swirled, and these forces throw the finely dispersed particles to the walls of device. This scientific paper shows a numerical simulation of gas flow dedusting process by means of ANSYS Fluent software package. The efficiency of dedusting the gas from the finely dispersed particles of up to 10 μm in the device is on average within the range of 53.8–76.7%. The exponential function, describing the changes in the pressure loss from the input gas rate, is obtained. In the course of studies, it was found that the pressure loss in the device is not more than 800 Pa at the input gas rate from 3 to 19 m/s.

Optimization for the Air-Pod Shape

2011 ◽  
Vol 308-310 ◽  
pp. 136-141
Author(s):  
Yan Chao Qiao ◽  
Zi Qi Guo ◽  
Bao Gang Zhang ◽  
Yao Lin Shi
Keyword(s):  
Experimental Data ◽  
Comparative Analysis ◽  
Wind Tunnel ◽  
Software Package ◽  
Program Assessment ◽  
Ansys Fluent ◽  
Fluent Software ◽  
Side Face ◽  
Wall Shear ◽  
D Model

in order to optimize the air-pod shape, this paper details work conducted using the commercial CFD software package ANSYS: Fluent to simulate the aerodynamic of air-pod. In our research, the results as followed: 1) In the benchmark, our comparative analysis of the flow over the NASA 0012 airfoil from the Experimental Data Base for Computer Program Assessment (AGARD-AR-138, 1979) implies that the ANSYS: Fluent software package numerical method simulates the airfoil viscous flow with the same accuracy as the wind-tunnel experiment. We can use it to finish our research. 2) We build the 3-D model to compute the aerodynamic of the air-pod. We choose the cylinder at first step. From the results we can see the pressure and wall shear concentrate at the side face of the cylinder. The pressure at the side faces is about twice than the direct side. Next step we will compute different models, such as spherical and drop-shaped, et al. then we can compare the pressure and wall shear field value for different models at different conditions. This work gives us best way to optimize the aerodynamic shape of air-pod.

The Experimental Study and Numerical Simulation of Turbulent Flow in Pumping Forebay

2009 ◽  
Author(s):  
Chao Liu ◽  
Jiren Zhou ◽  
Li Cheng
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Turbulent Flow ◽  
Three Dimensional ◽  
Computational Results ◽  
Experiment Study ◽  
Study Results ◽  
Measurement Results ◽  
Good Agreement ◽  
Made In

The experiment study was made to optimize the design of a pumping forebay. The Combined-sills were made in the forebay to eliminate the circulation and vortices of the diffusing flow successfully. The Numerical simulation of three-dimensional turbulent flow is applied on the complicate fore-and-aft flow of sills. The computational results are compared with the measurement results of physical model. The calculated results are in good agreement with the experimental data. The flow pattern is obviously improved. The study results have been applied in the project which gives a uniform approach flow to the pumping sump.

The Use of Steady Multi-Phase Position and Unsteady Computational Methods in the Numerical Simulation of Double-Suction Centrifugal Pump

2011 ◽  
Vol 181-182 ◽  
pp. 201-205
Author(s):  
Le Hu ◽  
Shu Jia Zhang ◽  
Cheng Xu
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Turbulent Flow ◽  
Centrifugal Pump ◽  
Power Efficiency ◽  
Simulated Performance ◽  
Performance Curves ◽  
Shaft Power ◽  
Unsteady Simulation ◽  
Multi Phase

In order to compare the steady multi-phase and unsteady calculation in double-suction centrifugal pump application, this article simulates the internal turbulent flow of the 150S-50 double suction centrifugal pump. Numerical simulation uses realizable turbulence model, simulating with two methods of steady multi-phase and unsteady in 7 cases. Based on the numerical simulation, the head, shaft power, efficiency were calculated, the simulated performance curves of a double suction centrifugal pump is processed. The results show that: The results of unsteady simulation are closer with the experimental data.

Numerical simulation of a flow past a triangular sail-type blade of a wind generator using the ANSYS FLUENT software package

2016 ◽  
Vol 61 (2) ◽  
pp. 299-301
Author(s):  
K. Kusaiynov ◽  
N. K. Tanasheva ◽  
L. L. Min’kov ◽  
B. R. Nusupbekov ◽  
Yu. O. Stepanova ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Software Package ◽  
Ansys Fluent ◽  
Wind Generator ◽  
Flow Past ◽  
Fluent Software

Experimental Measurements and Numerical Simulations in Isothermal Turbulent Flows

2012 ◽  
Author(s):  
Florin G. Florean ◽  
Jeni A. Popescu ◽  
Ionut Porumbel ◽  
Cristian Carlanescu ◽  
Gheorghe Dumitrascu
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Particle Image Velocimetry ◽  
Bluff Body ◽  
Particle Image ◽  
Experimental Measurements ◽  
Combustion System ◽  
Gas Generator ◽  
Turbine Engine ◽  
Image Velocimetry

The paper presents Particle Image Velocimetry experimental measurements and an ANSYS CFX numerical simulation of the mean and fluctuating velocity field in a turbulent, isothermal flow downstream of a V-shaped bluff body flame stabilizer equipping a post-combustion system installed downstream of a Garrett 30-67 gas turbine engine. The post-combustion system used as experimental model is described in detail, and the main characteristics of the Garrett 30-67 gas generator are included in the paper. Also, the instrumentation used on the experimental rig, including the Particle Image Velocimetry equipment, is briefly described. The presence of a bluff body inside the high speed flow creates a re-circulating wake structure, clearly seen in the experimental data. In the near field, the re-circulating region’s length and width of are captured reasonably well by the numerical simulation, but the momentum rate transfer further downstream is over-predicted, as the grid resolution worsens. An overall over prediction of the axial velocity by the numerical simulation is noted by comparing the numerical simulation results to the experimental data, explained by an over estimated inlet velocity in the numerical simulation, provided by Particle Image Velocimetry experimental measurements in the free exhaust jet behind the gas generator, without the installation of the post-combustion system, thus neglecting the effect of the latter on the operating regime of the gas turbine engine.

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