l34 - Lecture 34: Boundary Conditions for the Pressure...

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1 Lecture 34: Boundary Conditions for the Pressure Correction Equation Problem Solving
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2 Last Time … Looked at solution loop for the SIMPLE algorithm Examined auxiliary issues » Under-relaxation and convergence Started looking at boundary conditions » Nature of pressure in incompressible flows
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3 This Time … Complete our consideration of boundary conditions for the pressure correction equation Do an example using the SIMPLE algorithm
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4 Discrete Pressure Correction Equation Scarborough criterion satisfied in the equality b term is the amount by which the starred velocities do not satisfy continuity '' P P nb nb nb a p a p b 
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5 Pressure in Incompressible Flows Pressure does not change density » Absolute level of pressure does not matter Only pressure differences matter in incompressible flows When all bc are velocity bc, pressure level is indeterminate » p and p+c are solutions When at least one pressure bc is present
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This note was uploaded on 12/29/2011 for the course ME 608 taught by Professor Na during the Fall '10 term at Purdue University-West Lafayette.

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l34 - Lecture 34: Boundary Conditions for the Pressure...

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