scholarly journals Computational Fluid Dynamics (CFD) Study of Mixing and Heating Time Prediction for Two-Components Mixture in the Small-Scale Reactor

2019 ◽  
Author(s):  
Roman Havryliv ◽  
Iryna Kostiv
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heating Time ◽  
Small Scale ◽  
Time Prediction ◽  
Computational Fluid Dynamics Cfd ◽  
Scale Reactor

Computational fluid dynamics (CFD) investigation of air flow and temperature distribution in a small scale bread-baking oven

2012 ◽  
Vol 89 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Zinedine Khatir ◽  
Joe Paton ◽  
Harvey Thompson ◽  
Nik Kapur ◽  
Vassili Toropov ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Temperature Distribution ◽  
Air Flow ◽  
Small Scale ◽  
Computational Fluid Dynamics Cfd

Understanding Tire Acoustics Through Computational Fluid Dynamics (CFD) of Grooves With Deforming Walls

2015 ◽  
Author(s):  
Prashanta Gautam ◽  
Abhilash J. Chandy
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Stokes Equations ◽  
Road Traffic ◽  
Small Scale ◽  
Road Traffic Noise ◽  
Noise Generation ◽  
Cfd Model ◽  
Computational Fluid Dynamics Cfd ◽  
Generation Mechanisms

Reducing tire noise has been a topic of increased focus in the recent years in industrial countries in order to decrease road traffic noise. Computational fluid dynamics (CFD) simulations conducted using ANSYS FLUENT are presented here to provide a better understanding of the small-scale noise generation mechanisms due to air-pumping at the tire-road interface. The CFD model employs a large eddy simulation (LES) turbulence modeling approach, where the filtered compressible Navier-Stokes equations are solved for simple groove geometries with a moving bottom wall that represents the deformation due to the tire movement along the road surface. A horizontally moving wall is used to represent the motion of the tire groove in and out of the contact patch while the deformation of the groove is prescribed. Temporal and spatially accurate pressure fluctuations are utilized to determine sound pressure levels and dominant frequencies. In addition to an understanding of noise generation mechanisms in such grooves, the CFD model developed here can potentially provide a series of control parameters that can help optimize the tire performance in terms of tire acoustics.

Computational fluid dynamics (CFD) for “typical Dutch” houses failure: experiments and numerical modelling comparison.

2020 ◽  
Author(s):  
Manuel Andrés Díaz Loaiza ◽  
Benedikt Bratz ◽  
Jeremy Bricker ◽  
PAul Korswagen
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Model ◽  
Numerical Modelling ◽  
Flow Direction ◽  
Orientation Angle ◽  
Small Scale ◽  
Flow Conditions ◽  
Computational Fluid Dynamics Cfd ◽  
Multiple Variables

<p><strong>Computational fluid dynamics (CFD)  for “typical Dutch” houses failure: experiments and numerical modelling comparison.</strong></p><p>Authors: Andres Diaz Loaiza<sup>1</sup>, Benedikt Bratz<sup>1,2</sup>, Jeremy Bricker<sup>1</sup> and Paul Korswagen<sup>1</sup></p><p>1- Hydraulic Structures and Flood Risk, Technical University of Delft, 1- Technische Universität Braunschweig</p><p> </p><p>Coastal and riverine floods can be a catastrophic natural hazard with importance consequences. Many of the casualties occurring during these events can be attributed to the collapse of residential houses, and it is thus required to gain knowledge about the failure mechanism of these structures. Multiple variables can lead to various flow conditions that will in turn represent different load pressures over the house; among these, the type of the material (used in the construction), the orientation angle in respect to the main flow direction, the shape of the structure, and the urban density (blockage ratio), are relevant. In the present paper, small scale experiments are compared with CFD simulations performed with openFOAM in order to obtain a numerical model than can predict different combinations of load pressures for various flood events.</p><p> </p><p>The present study aims to represent different “typical Dutch” houses near or close to a dam break in which rapid high flow velocities and depths can be presented. The flow conditions and load pressures outputs are compared to physical results in order to validate the numerical model.</p>

Novel Experimental Power Curve Determination and Computational Methods for the Performance Analysis of Vertical Axis Wind Turbines

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
Jonathan M. Edwards ◽  
Louis Angelo Danao ◽  
Robert J. Howell
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Computational Methods ◽  
Computational Study ◽  
Vertical Axis ◽  
Small Scale ◽  
Vertical Axis Wind Turbine ◽  
Curve Determination ◽  
Computational Fluid Dynamics Cfd ◽  
The University

Through novel experimental and computational methods, this paper details a study into the performance aerodynamics of a small-scale vertical axis wind turbine (VAWT). A novel experimental method is first developed and validated before the results are compared to those of a computational fluid dynamics (CFD) study. The computational study is further validated by comparing the flow field to PIV data. The CFD simulations are then analyzed to explain the aerodynamics in further detail, including a discussion of the effect of the streamwise induction on the local angle of attack on the blade. The University of Sheffield’s three-bladed NACA0022 small-scale VAWT experimental rig is mounted within the University’s Low-Speed Wind Tunnel. Tests at tip speed ratios up to 5 were carried out, where the blade Reynolds number (based on rotational speed) ranged from 37,500 to 75,000. The same test conditions are simulated using unsteady computational fluid dynamics.

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