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Title: Direct Numerical Simulations of Turbulent Flow over Misaligned Traveling Waves

Journal Article · · International Journal of Heat and Fluid Flow

Direct numerical simulations of turbulent flow over prescribed traveling waves in a half-channel flow setup subject to a combined streamwise and spanwise pressure gradient are performed at a friction Reynolds number of 180. The simulations undertaken in this study consider both flow-aligned (including opposing and following) and misaligned waves as we attempt to quantify the effect of wave misalignment on turbulence statistics, the pressure drag force, and the wave attenuation rate. For the simulations, we consider three characteristic wave age values corresponding to slow-, intermediate-, and fast-moving waves. Wave misalignment is taken into account by applying a spanwise pressure gradient vertical to the traveling waves, which results in a three-dimensional turbulent flow field above the moving waves. Key flow quantities such as the mean velocity, velocity variances, and momentum fluxes are found to vary with the wave parameters, confirming the findings of previous studies.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4W)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1884296
Report Number(s):
NREL/JA-5000-82354; MainId:83127; UUID:f7160335-6abb-4f20-9eb8-dd9d49c7e2e4; MainAdminID:64327
Journal Information:
International Journal of Heat and Fluid Flow, Vol. 97
Country of Publication:
United States
Language:
English

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