Parviz Moin, Doctoral Dissertation Advisor (AC)
Velocity transformation for compressible wall-bounded turbulent flows with and without heat transfer.
Proceedings of the National Academy of Sciences of the United States of America
2021; 118 (34)
In this work, a transformation, which maps the mean velocity profiles of compressible wall-bounded turbulent flows to the incompressible law of the wall, is proposed. Unlike existing approaches, the proposed transformation successfully collapses, without specific tuning, numerical simulation data from fully developed channel and pipe flows, and boundary layers with or without heat transfer. In all these cases, the transformation is successful across the entire inner layer of the boundary layer (including the viscous sublayer, buffer layer, and logarithmic layer), recovers the asymptotically exact near-wall behavior in the viscous sublayer, and is consistent with the near balance of turbulence production and dissipation in the logarithmic region of the boundary layer. The performance of the transformation is verified for compressible wall-bounded flows with edge Mach numbers ranging from 0 to 15 and friction Reynolds numbers ranging from 200 to 2,000. Based on physical arguments, we show that such a general transformation exists for compressible wall-bounded turbulence regardless of the wall thermal condition.
View details for DOI 10.1073/pnas.2111144118
View details for PubMedID 34413197
- Velocity transformation for compressible wall-bounded turbulent flows with and without heat transfer PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 2021; 118 (34)
General method for determining the boundary layer thickness in nonequilibrium flows
Physical Review Fluids
2021; 6: 024608
View details for DOI 10.1103/PhysRevFluids.6.024608
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