Abstract
Direct Numerical Simulation (DNS) is used to study fully developed turbulent flow over a number of irregular rough surfaces in periodic plane channels. DNS in minimal channels, initially proposed by Chung et al. [7], is examined and generalized in the present research. To this end the DNS results for flow in channels with reduced streamwise and spanwise sizes (so-called minimal channels) are compared to those in large channels. Generation of roughness is based on a mathematical algorithm in which the height power spectrum of the roughness along with its height probability distribution can be prescribed (hence the term “pseudo-random” rough surface). This approach allows generation of roughness samples that may be considered as surrogates of realistic roughness and can replace the costly process of scanning industrial surfaces.
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Yang, J., Stroh, A., Forooghi, P. (2021). Simulation of Flow over Pseudo-Random Rough Surfaces. In: Nagel, W.E., Kröner, D.H., Resch, M.M. (eds) High Performance Computing in Science and Engineering '20. Springer, Cham. https://doi.org/10.1007/978-3-030-80602-6_25
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DOI: https://doi.org/10.1007/978-3-030-80602-6_25
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