TY - JOUR
T1 - A critical study on the influence of far field boundary conditions on the pressure distribution around a bluff body
AU - Parameswaran, Siva
AU - Andra, Ramesh
AU - Sun, Richard
AU - Gleason, Mark
N1 - Funding Information:
The financial support for this study was given by Chrysler corporation.
PY - 1997
Y1 - 1997
N2 - A computational model is developed to help the automotive design engineer to optimize the body shape with minimum wind tunnel testing. Unsteady, Reynolds-averaged, Navier Stokes equations are solved numerically by a finite-volume method and applied to study the flow around a 3/8th scale model of 1994 Intrepid. The standard k-ε model is employed to model the turbulence in the flow. The finite volume equations are formulated in a strong conservative form on a three-dimensional, unstructured grid system. The resulting equations are then solved by an implicit, time marching, pressure-correction based algorithm. The steady state solution is obtained by taking sufficient time steps until the flow field ceases to change with time within a prescribed tolerance. For the pressure-correction equation, preconditioned conjugate gradient method is employed to obtain the solution. Numerical predictions were obtained with two different boundary conditions at the far field: (a) no flow across this boundary (b) the gradient of any variable normal to this boundary was set to zero. Drag predictions obtained with boundary condition (b) was in good agreement with the available experimental data.
AB - A computational model is developed to help the automotive design engineer to optimize the body shape with minimum wind tunnel testing. Unsteady, Reynolds-averaged, Navier Stokes equations are solved numerically by a finite-volume method and applied to study the flow around a 3/8th scale model of 1994 Intrepid. The standard k-ε model is employed to model the turbulence in the flow. The finite volume equations are formulated in a strong conservative form on a three-dimensional, unstructured grid system. The resulting equations are then solved by an implicit, time marching, pressure-correction based algorithm. The steady state solution is obtained by taking sufficient time steps until the flow field ceases to change with time within a prescribed tolerance. For the pressure-correction equation, preconditioned conjugate gradient method is employed to obtain the solution. Numerical predictions were obtained with two different boundary conditions at the far field: (a) no flow across this boundary (b) the gradient of any variable normal to this boundary was set to zero. Drag predictions obtained with boundary condition (b) was in good agreement with the available experimental data.
UR - http://www.scopus.com/inward/record.url?scp=0031109546&partnerID=8YFLogxK
U2 - 10.1016/S0167-6105(97)00067-6
DO - 10.1016/S0167-6105(97)00067-6
M3 - Article
AN - SCOPUS:0031109546
SN - 0167-6105
VL - 67-68
SP - 117
EP - 127
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
ER -