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Selecting an Appropriate Turbulence Model
Posted Tue November 29, 2016 @12:05PM
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News has published a concise article on the various turbulence models available in commercial CFD software packages. The article lists the various models in use, their theoretical basis, advantages, and disadvantages.

Various empiric or semi-derived turbulence models have been created to help engineers to find the best model to fit their system of study, but this process could take a lot of trial, error and physical testing.

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“To make the selection of a turbulence model easier for end users,” suggested David Corson, director of program management at Altair, “[here are] what are widely accepted to be the most accurate general-purpose models: Spalart-Allmaras, SST and k-omega. For the majority of engineering applications, these models provide a good trade-off between [computational] cost and accuracy.”

Unfortunately, engineers need more than just a short list to make a correct selection. MIT professor Emilio Baglietto noted the importance of understanding the fundamental challenges, myths, fallacies, successes and failures of computational fluid dynamics (CFD) to determine a model with accuracy.

Read the full article here

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