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ENGINEERING JOURNAL OF RESEARCH AND DEVELOPMENT


Volume 31, No. 02, Month APRIL, Year 2020, Pages 105 - 117


Validation of wall functions for two-equation turbulence models of openfoam

Kittipos Loksupapaiboon, Chakrit Suvanjumrat


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The turbulence models are only valid in the turbulence flow which fully developed. Near walls, the turbulence Reynolds number is low and turbulence models do not perform well. The wall functions can be used to model the near wall region efficiently. The two-equation turbulence models compose of 𝑘−𝜀, 𝑘−𝜔, 𝑘−𝜔 𝑆𝑆𝑇, and 𝑅𝑁𝐺 𝑘−𝜀 models in OpenFOAM which is the open source software without the license cost and opening to edit codes had been applied with the wall functions for the flow validation. The 3-D lid-driven cavity flow models by turbulence models were developed to compare with the experiment. The wall function was applied on walls of the cell structure of each flow model. The comparison shown that the 𝑅𝑁𝐺 𝑘−𝜀 model with the wall function of viscous sub-layer (𝑦+=5) could represent flow behaviour inside the 3-D lid-driven cavity models correctly with the experimental results.


Keywords

wall function, turbulence model, OpenFOAM



ENGINEERING JOURNAL OF RESEARCH AND DEVELOPMENT


Published by : The Engineering Institute of Thailand Under H.M. The King's Patronage
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