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Showing results 1 to 12 of 12 Search took 0.00 seconds. Search: Posts Made By: florian_krause

Forum: OpenFOAM November 19, 2009, 07:57

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause dont know if its important to be an CFD... dont know if its important to be an CFD expert.... but still, for me the spatial averaging is something like cheating and not beeing fair to your CFD code. You obtain only one nice mean velocity...

Forum: OpenFOAM November 17, 2009, 06:19

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi Min Li, lets try to clarify this, cause I... Hi Min Li, lets try to clarify this, cause I am not doing any spatial averaging and I wanna do it correct. For me 'fully developed' is more a property of a turbulent flow, than something you...

Forum: OpenFOAM November 17, 2009, 03:47

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi Min Li, post-processing of my case is... Hi Min Li, post-processing of my case is going more or less allright. I can write now fields of u+ and y+ the slope of the u+(y+) graph looks more or less correct, up to u+(y+=5) the graph matches...

Forum: OpenFOAM October 20, 2009, 07:22

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hello guys, as I said, I will put my... Hello guys, as I said, I will put my intermediate result of my LES pipe flow with cyclic BC. Attached is the contour plot of instantaneous Ux in different cross sections and the UMean velocity...

Forum: OpenFOAM October 16, 2009, 03:33

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi Min Li, In my case, the RANS and... Hi Min Li, In my case, the RANS and LES computations are validations, so I just took a clearly written techn. paper with exp. and DNS results for pipe flow at Re=7000. They mention (refering...

Forum: OpenFOAM October 16, 2009, 02:29

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi Min Li, look at this thread: ... Hi Min Li, look at this thread: http://www.cfd-online.com/Forums/openfoam-solving/57889-les-turbulent-channel-flows.html as it is explained in Cedrics post in the above thread, it is...

Forum: OpenFOAM October 15, 2009, 12:07

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi Cedric, because I want to use the same... Hi Cedric, because I want to use the same solver for my RANS and LES calculations, I extended the OF1.6 pisoFoam with a source term as in channelFoam. So I can sustain the flow and have const....

Forum: OpenFOAM October 15, 2009, 10:44

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause I hope next week I can produce some plots like u+... I hope next week I can produce some plots like u+ over y+... my turbulence structure looks fine for and also the mean velocity profile matches quite good with given DNS and exp. data. I will now...

Forum: OpenFOAM October 15, 2009, 07:33

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hi, for my case I used the the... Hi, for my case I used the the perturbCylinder utility from the following thread. Depending on your OF version you have to modify it a bit to be able to compile it (I had to, since I am using...

Forum: OpenFOAM October 14, 2009, 04:53

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause Hello FOAMers! ...after talking to myself... Hello FOAMers! ...after talking to myself and reading some other threads, I think my calculation endtime was choosen too small, so that no turbulent structures can evolve within the computation...

Forum: OpenFOAM October 7, 2009, 04:28

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause 2.) For the second setup with the direct mapped... 2.) For the second setup with the direct mapped inlet, I used the same pipe geometry and the same grid. I basically copied the boundary condition from the pitzDailyDirectMapped tutorial case. I...

Forum: OpenFOAM October 7, 2009, 04:12

Replies: 22 setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Views: 14,677 Posted By florian_krause setup problems - LES pipe flow with cyclic BC (1) and direct mapped inlet (2) Hi guys and especially LES-pipe-flow-experts ;-) On OF-1.6.x, I am using pisoFOAM with LES turbulence model to simulate a fully turbulent pipe flow with Re=7000 based on the centreline velocity. ...

Showing results 1 to 12 of 12

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