4 papers · 1 filter
A formal log(Re)-cost framework for the engineering turbulence problem
Jiaqi Li, Robert F. Kunz, George Huang +1
In fluid engineering, the turbulence problem is the longstanding challenge of obtaining accurate predictions of engineering quantities at affordable computational cost. Viewed thro…
Integral analysis based diagnostics of turbulence model errors in skin friction
Shyam S. Nair, Vishal A. Wadhai, Robert F. Kunz +1
Error diagnostics for turbulence models have traditionally focused on engineering quantities of interest, such as the skin-friction coefficient, , most often by comparing the…
Rough surfaces in under-explored surface morphology space and their implications on roughness modelling
Shyam S. Nair, Vishal A. Wadhai, Robert F. Kunz +1
We report direct numerical simulation (DNS) results of the rough-wall channel, focusing on roughness with high statistics but small to negative statistics, and w…
Constrained re-calibration of Reynolds-averaged Navier-Stokes models
Yuanwei Bin, George Huang, Robert Kunz +1
The constants and functions in Reynolds-averaged Navier Stokes (RANS) turbulence models are coupled. Consequently, modifications of a RANS model often negatively impact its basic c…