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Showing results 1 to 8 of 8 Search took 0.00 seconds. Search: Posts Made By: Jeremie84

Forum: Main CFD Forum June 4, 2012, 16:15

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 I was also thinking… Since the pressure drag... I was also thinking… Since the pressure drag comprises more than 90% of total trailer drag, a first option could be to consider all the vehicle’s walls as slip walls, and thus neglect the boundary...

Forum: Main CFD Forum June 4, 2012, 09:38

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 Thanks again for your advice. If it was just up... Thanks again for your advice. If it was just up to me, I would already use Fluent 14... :-)

Forum: Main CFD Forum June 4, 2012, 09:27

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 I am using ANSYS Fluent 12.1 Concerning... I am using ANSYS Fluent 12.1 Concerning turbulence, Realizable k-e model seems well suited for automotive external aerodynamics. Regards, Jeremie

Forum: Main CFD Forum June 1, 2012, 13:34

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 Thank you very much Far for your advice and for... Thank you very much Far for your advice and for these articles. You answered my question. I will probably apply a slip condition to the walls where I don't compute the drag force. And try to use...

Forum: Main CFD Forum June 1, 2012, 11:20

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 Thank you Far, I understand your point and it... Thank you Far, I understand your point and it is very useful to understand the difference between loss of accuracy and wrong physics. But just to be sure: how y+ can be equal to 0? If I have...

Forum: Main CFD Forum June 1, 2012, 10:19

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 OK, thanks. I will try both. I assume that in... OK, thanks. I will try both. I assume that in both cases, I will have a lack of accuracy (although I am not looking for accuracy on these particular walls because I am not computing the drag...

Forum: Main CFD Forum June 1, 2012, 09:00

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 Thanks for your answer. Yes I will use RANS... Thanks for your answer. Yes I will use RANS formulation. Ideally, I’d like to capture the viscous sublayer (as you mentioned). But unfortunately that will depend on the cell count (compromise...

Forum: Main CFD Forum May 31, 2012, 16:14

Replies: 15 Drag prediction and wall boundary condition Views: 2,083 Posted By Jeremie84 Drag prediction and wall boundary condition Hello everyone, I’m modeling a semi-trailer truck with a drag reducing device on it (trailer skirts). I want to compute the drag coefficient of the underbody and skirts. I am doing a hybrid mesh...

Showing results 1 to 8 of 8

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