TY - GEN
T1 - A combined application of the integral wall model and the rough wall rescaling-recycling method
AU - Yang, X.
AU - Sadique, J.
AU - Mittal, R.
AU - Meneveau, C.
N1 - Publisher Copyright:
© 2015, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2015
Y1 - 2015
N2 - In this study, a recently proposed integral wall model and concurrent inflow generation technique are applied in Large-Eddy-Simulation (iWMLES) of developing turbulent boundary layer flow over cuboidal roughness. We examine the performance of this integral wall model at various Reynolds numbers. The integral wall model is based on the von-Karman-Pohlhausen integral method. With several parameters in the proposed functional form of the velocity profile determined from the local flow conditions, the wall model predicts velocity profiles that satisfy the vertically integrated momentum equation. Only an algebraic system must be solved in the wall model which thus preserves the essential economy of equilibrium type models. The rough wall inflow generation technique is proposed based on a new definition of a length scale that is appropriate for the roughness dominated inner layer. It extends the rescaling-recycling method to rough surfaces. The integral wall model and the rough wall rescaling-recycling method are applied in Large Eddy Simulations of turbulent boundary layers over surface with distributed cuboidal roughness. The effect of Reynolds number is studied. A good agreement is found between the roughness function (velocity shift) measured in iWMLES and the Colebrook formula and previous experimental measurements.
AB - In this study, a recently proposed integral wall model and concurrent inflow generation technique are applied in Large-Eddy-Simulation (iWMLES) of developing turbulent boundary layer flow over cuboidal roughness. We examine the performance of this integral wall model at various Reynolds numbers. The integral wall model is based on the von-Karman-Pohlhausen integral method. With several parameters in the proposed functional form of the velocity profile determined from the local flow conditions, the wall model predicts velocity profiles that satisfy the vertically integrated momentum equation. Only an algebraic system must be solved in the wall model which thus preserves the essential economy of equilibrium type models. The rough wall inflow generation technique is proposed based on a new definition of a length scale that is appropriate for the roughness dominated inner layer. It extends the rescaling-recycling method to rough surfaces. The integral wall model and the rough wall rescaling-recycling method are applied in Large Eddy Simulations of turbulent boundary layers over surface with distributed cuboidal roughness. The effect of Reynolds number is studied. A good agreement is found between the roughness function (velocity shift) measured in iWMLES and the Colebrook formula and previous experimental measurements.
UR - http://www.scopus.com/inward/record.url?scp=84962619380&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962619380&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84962619380
SN - 9781624103667
T3 - 22nd AIAA Computational Fluid Dynamics Conference
BT - 22nd AIAA Computational Fluid Dynamics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 22nd AIAA Computational Fluid Dynamics Conference, 2015
Y2 - 22 June 2015 through 26 June 2015
ER -