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The Spalart-Allmaras model differs from the RANS equations by ___________

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in Computational Fluid Dynamics by (118k points)
The Spalart-Allmaras model differs from the RANS equations by ___________

(a) four extra transport equations

(b) one extra transport equation

(c) two extra transport equations

(d) three extra transport equations

This question was posed to me during an interview for a job.

My enquiry is from Turbulence Modelling in portion Turbulence Modelling of Computational Fluid Dynamics

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Right option is (b) one extra transport equation

Easy explanation: Spalart-Allmaras is a turbulence model to the RANS equations. This has an extra transport equation. This extra transport equation is used to overcome the non-linear problem of the RANS equations.

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