Which of these methods is used in the compressible flows to find the densities at the faces?(a) Central difference(b) Upwind difference(c) Rhie-chow interpolation(d) Weighted averageI have been asked this question during an internship interview.My doubt stems from Compressible Flows in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Which of these methods is used in the compressible flows to find the d

1.	Which of these methods is used in the compressible flows to find the densities at the faces?(a) Central difference(b) Upwind difference(c) Rhie-chow interpolation(d) Weighted averageI have been asked this question during an internship interview.My doubt stems from Compressible Flows in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics
Answer» Correct choice is (b) UPWIND difference The explanation: The central difference SCHEME (or linear interpolation profile) produces OSCILLATIONS at high speeds. So, a bounded upwind FIRST or higher-order equation is used to get the density VALUES at the interfaces.

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