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Old   May 27, 2010, 08:38
Default strictly bounded scalars
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Moritz Wied
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Hi all,
is anybody working with strictly bounded scalars in Version 1.6?

if i put e.g.

div(phi,U) Gauss limitedVanLeer -10 10

into the fvSchemes,

when starting simpleFoam an error occurs with an unknown scheme and it shows me a list of available schemes where no limited schemes are listed..


i found this list regarding Version 1.5
interpolationScheme Valid schemes are :
(
MUSCL01
localBlended
Minmod
limitedCubic01
QUICK
MC
limitedGamma
upwind
limitedLinear01
filteredLinear2
vanLeer
limitedCubic
SFCD
midPoint
clippedLinear
outletStabilised
SuperBee
linearUpwind
filteredLinear
Gamma01
MUSCL
limitedVanLeer
limitedMUSCL
Gamma
limitedLimitedLinear
vanAlbada
downwind
localMin
localMax
limitedLinear
skewCorrected
linear
UMIST
reverseLinear
vanLeer01
limitedLimitedCubic
weighted
blended
cubic
harmonic
OSPRE
)

the entries:

limitedGamma
limitedCubic
limitedVanLeer
limitedMUSCL
limitedLimitedLinear
limitedLimitedCubic

are not shown for me in 1.6..

anybody has experience with that?

all the best,
Moritz
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Old   May 27, 2010, 11:35
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Ulrich Heck
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Hi Moritz,

you will not see the strictly bounded scalars because U is a vector field. You can check them for div(phi,k) or div(phi,omega). From my experience they work well, e.g. limitedGamma can give more stability for turbulence variables.
Hope this helps.
Best regards
Ulrich
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Old   May 27, 2010, 13:03
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Moritz Wied
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Hi Ullrich,

thank alot for response, you saved my day as at least the solver is starting now.

I used

div(phi,k) Gauss limitedGamma 0.5 1e-10 10
div(phi,epsilon) Gauss limitedGamma 0.5 1e-10 10

so i guess the 0.5 is for Gamma and 1e-10 10 i chose as the bounds for k and epsilon.

By the way, what is the parameter for Gamma for?

Unfortunately epsilon is still exploding after some iterations...
any idea?

all the best,
Moritz
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Old   July 19, 2010, 17:18
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Claus Meister
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Can anybody explain how strictly bounded limites works?
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