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help with rAU variable...icoFoam,

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Old   November 18, 2011, 21:42
Default help with rAU variable...icoFoam,
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Ricardo
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Dear all,

I am trying to understand what the rAU variable does in the code. It is defined in the UEquation and also used to calculate the pEqn (the velocity and pressure of incompressible fluid flow). Can anybody help me understand what this variable means? Thanks

it is defined as in the UEqn source code as:

rAU = 1.0/UEqn.A()
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Old   November 23, 2011, 03:42
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Nima Sam
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look at here:
http://www.cfd-online.com/Wiki/Veloc...ssure_coupling
or a reference cfd book to see how piso or simple Algorithm works
but in brief
A() returns the diagonal part of matrix of U, so rUA is the inverse of diagonal part
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Old   November 23, 2011, 04:28
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Bernhard
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A good reference for these kind of questions in the PhD thesis by Jasak: http://powerlab.fsb.hr/ped/kturbo/Op...jeJasakPhD.pdf
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Old   December 8, 2011, 20:25
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Ricardo
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Sorry for late response. But Thank you!!

Quote:
Originally Posted by nimasam View Post
look at here:
http://www.cfd-online.com/Wiki/Veloc...ssure_coupling
or a reference cfd book to see how piso or simple Algorithm works
but in brief
A() returns the diagonal part of matrix of U, so rUA is the inverse of diagonal part
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Old   December 8, 2011, 20:26
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Ricardo
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Thank you Bernhard!!!

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Originally Posted by Bernhard View Post
A good reference for these kind of questions in the PhD thesis by Jasak: http://powerlab.fsb.hr/ped/kturbo/Op...jeJasakPhD.pdf
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