strictly bounded scalars

Mo-ITB · May 27, 2010, 08:38

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

ulli · May 27, 2010, 11:35

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

Mo-ITB · May 27, 2010, 13:03

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

idrama · July 19, 2010, 17:18

Can anybody explain how strictly bounded limites works?

May 27, 2010, 08:38	strictly bounded scalars	#1
Mo-ITB Member Moritz Wied Join Date: Mar 2010 Location: suttgart, germany Posts: 35 Rep Power: 16	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

May 27, 2010, 13:03		#3
Mo-ITB Member Moritz Wied Join Date: Mar 2010 Location: suttgart, germany Posts: 35 Rep Power: 16	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 hhu_lulu likes this.

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May 27, 2010, 11:35		#2
ulli Member Ulrich Heck Join Date: Mar 2009 Location: Krefeld, Germany Posts: 41 Rep Power: 17	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

July 19, 2010, 17:18		#4
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	Can anybody explain how strictly bounded limites works?