Hakan Nilsson, Chalmers / Applied Mechanics / Fluid Dynamics 1

PhD course in CFD with OpenSource software, 2009Assignment 1Farhan Matin

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The Assignment includes the following cases

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• cavity, cavityClipped, cavityFine, cavityGrade, cavityHighRe

• plateHole

• damBreak, damBreakFine

• cylinder

• pitzDaily

• forwardStep

• decompressionTank, decompressionTankFine

• and hartmann.

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cavity

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Fig: the Mesh

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cavity continued

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Fig: Velocity profile at time= 0.5s

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cavityClipped

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Fig: the Mesh

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cavityClipped

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Fig: cell based pressure at time= 0.6s

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cavityFine

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Fig: the Mesh

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cavityFine continued

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Fig: cell based pressure at time= 0.7s

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cavityGrade

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Fig: the Mesh

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cavityGrade continued

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Fig: Velocity contours shown at time= 0.5s

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cavityHighRe

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Fig: Velocity distribution clipped at plane, time= 0.5s

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plateHole

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Fig: the Mesh at some selective patches

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plateHole continued

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Fig: sigmaxy distribution at time= 100

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damBreak

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Fig: alpha1 profile at initial condition

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damBreak continued

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Fig: alpha1 profile at time= 0.25s

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damBreak continued

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Fig: alpha1 profile at time= 0.5s

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damBreakFine

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Fig: alpha1 profile at time= 0.25s

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damBreakFine continued

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Fig: alpha1 profile at time= 0.5s

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cylinder

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Fig: the analytical solution

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cylinder continued

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Fig: stream tracing with nNonOrthogonalCorrectors= 0

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cylinder continued

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Fig: velocity glyph with nNonOrthogonalCorrectors= 3

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pitzDaily

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Fig: veocity glyph at, time= 50

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pitzDaily continued

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Fig: velocity glyph at time= 1000, having reached steady state

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forwardStep

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Fig: pressure distribution at time= 10

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decompressionTank

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Fig: pressure contours at time= 5

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decompressionTank continued

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Fig: pressure contours at time= 10

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decompressionTankFine

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Fig: pressure contours at time= 5

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decompressionTankFine continued

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Fig: pressure contours at time= 10

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hartmann

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Fig: magnetic flux density at time= 2

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Modified case: forwardStepFine

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This is a modified case of the forwardStep case.It has a refined mesh of a factor of 2.But the calculation was run till time= 0.5s.This is long before reaching the steady state,which is evident from the figure in the next page.

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Modified case: forwardStepFine

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Fig: velocity distribution at time= 0.5...incomplete calculation