URGENT!!!!!!

June 1, 2006, 04:29

Hi friends, I have simulated the flow over a blunt body (supersonic flow) and I have obtained the results. But, during the process, first i tried with "laminar flow", solver converged but the reslults were wrong. Then I set "K-epsilon Turbulence model with less than 1% option". That also converged but results were wrong. But with "medium 5% option" I got the results which were acceptable. CAN ANYBODY EXPLAIN ME "WHY IT HAPPENED SO?" AND "WHERE I CAN GET THE GOVERNING EQUATION OF THIS MEDIUM 5%-TURBULENCE?". I AM ABOUT TO PRESENT A SEMINAR ON THIS PROBLEM. PLEASE HELP. Thanks in advance. REGARDS VVJ.

June 1, 2006, 09:04

You shouldnt be using a CFD code if you have little to no understanding of the physics underlying fluid dyanmics AND a reasonable grasp of numerical methods for solving PDEs.

(1) Put down your keyboard and pick up a textbook ... (2) Google for "forum etiquette" ...

June 1, 2006, 17:01

Haven't you read some paper on the subject or article on www.cfd-online.com?

June 1, 2006, 04:29	URGENT!!!!!!	#1
Vijesh Joshi Guest Posts: n/a	Hi friends, I have simulated the flow over a blunt body (supersonic flow) and I have obtained the results. But, during the process, first i tried with "laminar flow", solver converged but the reslults were wrong. Then I set "K-epsilon Turbulence model with less than 1% option". That also converged but results were wrong. But with "medium 5% option" I got the results which were acceptable. CAN ANYBODY EXPLAIN ME "WHY IT HAPPENED SO?" AND "WHERE I CAN GET THE GOVERNING EQUATION OF THIS MEDIUM 5%-TURBULENCE?". I AM ABOUT TO PRESENT A SEMINAR ON THIS PROBLEM. PLEASE HELP. Thanks in advance. REGARDS VVJ.

June 1, 2006, 09:04	Re: URGENT!!!!!!	#2
Joe Guest Posts: n/a	You shouldnt be using a CFD code if you have little to no understanding of the physics underlying fluid dyanmics AND a reasonable grasp of numerical methods for solving PDEs. (1) Put down your keyboard and pick up a textbook ... (2) Google for "forum etiquette" ...

June 1, 2006, 17:01	Re: URGENT!!!!!!	#3
Poldu Guest Posts: n/a	Haven't you read some paper on the subject or article on www.cfd-online.com?

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