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Showing results 1 to 10 of 10 Search took 0.00 seconds. Search: Posts Made By: Kio

Forum: OpenFOAM Pre-Processing September 13, 2013, 06:41

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio I try with a mesh generated automatically by a... I try with a mesh generated automatically by a script found here https://www.hpc.ntnu.no/display/hpc/OpenFOAM+-+Airfoil+Calculations Although the pressure field is not accurate like that of the...

Forum: OpenFOAM Pre-Processing September 11, 2013, 13:37

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio ok, thanks again. Probably the problem is related... ok, thanks again. Probably the problem is related to the compressible flow

Forum: OpenFOAM Pre-Processing September 11, 2013, 09:56

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio thank you very much Naruto, I tried also with... thank you very much Naruto, I tried also with simpleFoam and you boundary conditions (my original solver was sonicFoam) but the result remains the same, the cl is too low and cd too high. Are you...

Forum: OpenFOAM Pre-Processing September 11, 2013, 07:15

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio A little doubt: I read all the threads about... A little doubt: I read all the threads about airfoil simulation on the forum and I observed that in all simulations the airfoil mesh is divided in two patches, top and bottom, but only one...

Forum: OpenFOAM Pre-Processing September 11, 2013, 04:18

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio Hello everybody, after one month I do not find... Hello everybody, after one month I do not find the problem. I try different meshes and turbulence models but the problem is still the same, pressure field is correct but cl and cd are understimate....

Forum: OpenFOAM Pre-Processing July 30, 2013, 03:51

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio No the reference area is correct, I calculated... No the reference area is correct, I calculated area in the way you tell me. The flow simulated is correct, I cannot understand. The cd and cl coefficient are non dimensional, so I could compare...

Forum: OpenFOAM Pre-Processing July 27, 2013, 13:20

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio Yes, the chord length is 0.1254 m. The values are... Yes, the chord length is 0.1254 m. The values are experimental, from a report NASA. I check that the flow conditions are the same.

Forum: OpenFOAM Pre-Processing July 27, 2013, 04:42

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio Hi, sorry I forgot it. It is a 2D case, the... Hi, sorry I forgot it. It is a 2D case, the turbulence intensity is 10% of the velocity and turbulence lenght scale is 0.0965 . Here the case setup for the k-epsilon model. thanks to all

Forum: OpenFOAM Pre-Processing July 25, 2013, 13:54

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio something that could help to understand the... something that could help to understand the problem with k and epsilon (or omega, with all models are the same..)

Forum: OpenFOAM Pre-Processing July 25, 2013, 11:58

Replies: 15 Airfoil lift and drag understimated Views: 4,365 Posted By Kio Airfoil lift and drag understimated Hello everybody, I am quite new in CFD and in particular in OpenFoam. I use the 2.1.1 version and I try to simulate the behaviour of a 4415 airfoil at different angle of attack. There were no...

Showing results 1 to 10 of 10

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