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Can a non-staggered grid Method used here?

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Old   June 11, 2002, 07:20
Default Can a non-staggered grid Method used here?
  #1
lololo
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Dear sir: I took pseudo-compressibility idea to process the continuity equation, Can I also used the non-staggered grid Method(By: Rhie C M ,Chow W L, 1983) now?

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Old   June 12, 2002, 04:49
Default Re: Can a non-staggered grid Method used here?
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versi
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The pseudo-compressibility method is mostly implemented on non-staggered grid because the P and V are coupled ,the method is free of compatability constraint which is encountered in other Poisson type methods, and is flexiable in complex geometries.
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Old   June 12, 2002, 07:16
Default Re: Can a non-staggered grid Method used here?
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lololo
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Sir: Thank you for your kind answers.

Do you mean that we can use collocated arrangement for Vi and P taking no account for the oscillating pressure field which occur in SIMPLE Method?

and, can I use the central diffence scheme for discretisation of the Pressue gradient item in this case?
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Old   June 12, 2002, 21:00
Default Re: Can a non-staggered grid Method used here?
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versi
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Since you use artificial compresssiblity method, it is of hyperbolic type, and upwind scheme is preferable for all inviscid terms. A central scheme will lead to instability on collocated grid.
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Old   June 13, 2002, 16:47
Default Re: Can a non-staggered grid Method used here?
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Jim Park
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You need to be sure that you mean "collocated" and not "colocated."

Colocated means that the velocities and pressure are evaluated at the same point (as opposed to a "staggered" location scheme).

Collocated is a mathematical term - I think (and will be corrected!) that it has to do with interpolation or as method to solve ODE's.

From the context of your posts, you are probably talking about "colocated."
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