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queries on M.Peric's example code

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Old   April 18, 2006, 09:36
Default queries on M.Peric's example code
  #1
wildgrass
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in the codes of Computational methods for fluid dynamics, density sets as 1, and viscosity is equal to 0.001. So what kind of material does it delegate? water (density=1000, viscosity=0.001), or Air (density=1.29, viscosity=0.000001). the corresponding code can be downloaded from springe's ftp

ftp://ftp.springer.de/pub/technik/peric/
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Old   April 18, 2006, 12:08
Default Re: queries on M.Peric's example code
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John
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The beauty of CFD, comparing to the experiment, is that you can specify any property values such as density and viscosity to the fluid. Let's say for a flow in pipe, Reynolds number determines the flow being laminar or turbulent. Re=(density*velocity*diameter/Viscosity). By adjusting density and/or viscosity, you can achieve desirable Re without changing velocity.
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Old   April 18, 2006, 19:28
Default Re: queries on M.Peric's example code
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Halim
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It solves the non-dimensional Navier-Stokes equations of Reynolds number=1000 for any fluids. If you read the Patankar's book, there is a section explaining this kind of treatment.
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