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Instabilities related to high Peclet number

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July 9, 2014, 16:38	Instabilities related to high Peclet number	#1
kooroshg1 New Member Koorosh Join Date: Feb 2013 Posts: 8 Rep Power: 13	I am trying to write a CFD code based on finite volume method. I am using the SIMPLE method for pressure-velocity coupling and Hybrid differencing scheme for calculating the flux values on cell faces. The code works perfectly with viscosity near 1.0 but when I decreases the viscosity everything breaks down. I am quite sure it is because of Pe > 2 at the cell faces. Can you guys help me on this? Is high Peclet number is what causing my problem? Is artificial viscosity a solution to this problem?

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