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Showing results 1 to 16 of 16 Search took 0.00 seconds. Search: Posts Made By: Phili

Forum: CFX June 12, 2014, 02:37

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Let me add something to my question: Is... Let me add something to my question: Is there a common way to calculate/find out heat transfer coefficients using the CHT approach ?

Forum: CFX June 10, 2014, 07:38

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Got it. So am I assuming correctly, that since... Got it. So am I assuming correctly, that since I'm applying the heat flux boundary on the outer pipe wall, I'm just using the lower HTC value for the outside wall. Moreover the heat flux and the HTC...

Forum: CFX June 10, 2014, 06:03

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Thanks for your reply ghorrocks. Yeah, so far I... Thanks for your reply ghorrocks. Yeah, so far I understood the method. I just wonder now, whether the HTC I have to use is a combined HTC (so HTC at the inner wall and HTC at the outer wall) or just...

Forum: CFX June 10, 2014, 04:49

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Any advice? Any advice?

Forum: CFX June 3, 2014, 16:40

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Just wanted to keep you guys updated: I've used... Just wanted to keep you guys updated: I've used your approach for my simulation and I am now waiting for the test bench to be available, in order to validate my results. I have one more question....

Forum: CFX May 16, 2014, 05:59

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Well it depends on what ones definition of... Well it depends on what ones definition of significant is. At high exhaust gas temperatures I have got a gradient from inner to outer wall temperature of about 7% (measured experimentally). But...

Forum: CFX May 16, 2014, 03:16

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Well of course I have got a temperature gradient... Well of course I have got a temperature gradient through the pipe wall.

Forum: CFX May 15, 2014, 16:36

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili After taking a break from the project due to... After taking a break from the project due to exams, I'm focusing on my simulation again. I have one more question regarding your approach, Stumpy: Do I guess at the inner wall temperatures and...

Forum: CFX March 30, 2014, 11:56

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Btw, what are your experiences on theoretically... Btw, what are your experiences on theoretically calculating HTCs, using Gnielinski correlation, Dittus-Boelter equation etc?

Forum: CFX March 29, 2014, 12:22

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili I get your point. My problem is that I have to... I get your point. My problem is that I have to use the existing mesh, that I've gotten as part of the assignment. In the mesh, only the fluid domain is modeled (basically like e.g. in the...

Forum: CFX March 28, 2014, 07:18

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili As I said, I would like to do it like that, but... As I said, I would like to do it like that, but since I'm doing the simulation as part of a university project, I'm not allowed to... -.- As for the radiation, the simple approach should be fine...

Forum: CFX March 28, 2014, 05:07

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili After discussing some possibilities, I gonna have... After discussing some possibilities, I gonna have to try your approach. Just to be sure I understood it correctly: Let's say my exhaust gas has a temperature of X. I simulate the fluid...

Forum: CFX March 25, 2014, 12:59

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Yeah I share your opinion that it would be much... Yeah I share your opinion that it would be much easier to simulate the fluid and solid domain in CFX. Unfortunately we've to use the existing meshes which only contain the inlet, outlet and wall.

Forum: CFX March 25, 2014, 05:47

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili I do have measurements of the outside temperature... I do have measurements of the outside temperature of the pipe for a few operating points but I'm not allowed to use them for my simulation. They're just intented to be a validation for my simulation....

Forum: CFX March 25, 2014, 05:19

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Yeah, since I want to validate my simulation with... Yeah, since I want to validate my simulation with experimental results from a test bench, I know the temperature of the surrounding air.

Forum: CFX March 25, 2014, 03:57

Replies: 30 Heat transfer simulation of exhaust manifold Views: 5,423 Posted By Phili Heat transfer simulation of exhaust manifold Hello everyone, for a research at university I need to simulate heat transfer / heat loss in an exhaust manifold using CFX / Ansys Mechanical (I'm interested in how much heat is lost in the...

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