Forum: OpenFOAM Running, Solving & CFD
April 8, 2008, 04:23
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Replies: 49
Views: 6,851
Hi Dragos
for 4,i think it
Hi Dragos
for 4,i think it creat all faces of cells,here,faces including internal faces and boundary faces which is n1as i metioned last time.and the boundary faces is n2. so n1 >>n2.
and in...
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Forum: OpenFOAM Running, Solving & CFD
April 8, 2008, 02:25
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 09:19
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Replies: 49
Views: 6,851
hi
i will try.thanks!
wo
hi
i will try.thanks!
would you mind to tell me more about the faceSet, i can not understand the both two faceSet in "mix2D".
for the last one i guess i will delete the boundary for the...
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 05:06
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Replies: 49
Views: 6,851
and if i change the k and epsi
and if i change the k and epsilon patchField to the zeroGradient, the calculation will divgence after about 200 steps. when i check the flow inside, there is some strange velocity: ...
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 04:52
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Replies: 49
Views: 6,851
i have just try your way ,and
i have just try your way ,and both yours and mine are face the problem. there is a error in the first step
--> FOAM FATAL ERROR : fixedValue is the wrong k patchField type for wall-functions on...
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 04:26
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Replies: 49
Views: 6,851
Hi
so according to you，i s
Hi
so according to you，i should delete boundary by a faceSet? and make the boundary by defining them in patch dictionary MRFZones？
wayne
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 03:27
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Replies: 49
Views: 6,851
Hi
i am sorry for the last i
Hi
i am sorry for the last image is vector of U on shroud wall,which is also the rotating zone like hub,and you can the angular velocity clearly here,and the same as HUB.
does that mean i have...
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 03:21
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 7, 2008, 03:06
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Replies: 49
Views: 6,851
Hi
how to impose?
i try to m
Hi
how to impose?
i try to make a faceset like:
name IMPELLLER;//name of the cellzone
action new;
topoSetSources
(
boundaryToFace
{
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Forum: OpenFOAM Running, Solving & CFD
April 6, 2008, 22:26
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Replies: 49
Views: 6,851
Hi
i am sorry for i am aw
Hi
i am sorry for i am away for the passed few days. and now i am back to my office.
i have check for that right now,and you are right, i gave a wrong rotation axis dirction.i will...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 13:31
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Replies: 49
Views: 6,851
Hi
i am not working with my c
Hi
i am not working with my computer now.and i remember the omega is defined as [0 0 -1] 75.88
(impeller`s rotation speed is 725rpm, direction in -z).you could look at the "cfx" image...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 10:41
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Replies: 49
Views: 6,851
by last, i mean in cfx result,
by last, i mean in cfx result, there is a rotation around the axia in evidence,the rotation direction is the same as i have imposed,but there is no rotation in Foam result.
i think it will a...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 10:32
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Replies: 49
Views: 6,851
Hi
I still think the impelle
Hi
i have checked that,the direction of rotation is the same in foam and cfx.or please look at the last two images,especially in cfx,the velocity vectors around axis (central of the blue circle...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 05:32
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 05:30
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 05:27
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Replies: 49
Views: 6,851
and look at next two picture (
and look at next two picture (1 is foam ,2 is CFX)
1
http://www.cfd-online.com/OpenFOAM_Discus/clipart/your_image.gif
2
http://www.cfd-online.com/OpenFOAM_Discus/clipart/your_image.gif
you...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:27
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Replies: 49
Views: 6,851
and also there is velocity in
and also there is velocity in the hub and the shroud (which is up and down boundary of the impeller)
--->
and also there is no velocity in the hub and the shroud (which is up and down boundary of...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:25
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Replies: 49
Views: 6,851
i agree with " they are not al
i agree with " they are not along the blades",and they do not normal to the blade too.
and also there is velocity in the hub and the shroud (which is up and down boundary of the impeller).
...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:06
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Replies: 49
Views: 6,851
Hi
i am sorry.too too much t
Hi
i am sorry.too too much try maybe.and also there is no velocity(U=0)in hub and shroud boundays in my result.but i think there should be angular velocity like mixvessl2d'rotor.
i do not know...
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:03
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:01
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 04:00
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 03:59
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Replies: 49
Views: 6,851
c relative velocity (at the s
c relative velocity (at the same conditon) calculated by CFX
http://www.cfd-online.com/OpenFOAM_Discus/clipart/your_image.gif
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 03:58
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Replies: 49
Views: 6,851
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Forum: OpenFOAM Running, Solving & CFD
April 3, 2008, 03:50
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Replies: 49
Views: 6,851
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