please help me for general description of CFD

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 April 6, 2009, 20:15 please help me for general description of CFD #1 New Member   kim jiyeon Join Date: Mar 2009 Posts: 2 Rep Power: 0 hello everyone i happend to take a presentation of CFD introduction at my work. there is a number of people only familiar with concent of CFD. so i prepared for just applications and beginer stuff but a senior resercher wants to me to clarify about is there a limit when we use CFD, what is a design factor of N-S eq, and how's different when open channel flow and closed channel flow in design factor wise. i studied CFD but i never teach anyone about this so i really need help. if anyone of you have answers i'll appriciate. Last edited by Jiyeon; April 6, 2009 at 20:34.

 April 7, 2009, 01:42 #2 New Member   Philip C. Join Date: Mar 2009 Posts: 1 Rep Power: 0 your question is too broad and ambigue to be answered...sorry... you can find many proper materials from many other well prepared CFD books on CFD resource part of this CFD-online site and they would be very helpful for your mission...i think...

April 7, 2009, 06:31
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majid
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Location: Tehran,Iran
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The main difficulty in numerical simulations like CFD is to come to stability and convergence.Moreover, we need to experimental data to verify our numerical results; however, we can model or simulate almost all kind of fluid flows numerically, which may be more difficult experimentaly.
Quote:
 Originally Posted by Jiyeon hello everyone i happend to take a presentation of CFD introduction at my work. there is a number of people only familiar with concent of CFD. so i prepared for just applications and beginer stuff but a senior resercher wants to me to clarify about is there a limit when we use CFD, what is a design factor of N-S eq, and how's different when open channel flow and closed channel flow in design factor wise. i studied CFD but i never teach anyone about this so i really need help. if anyone of you have answers i'll appriciate.

 April 7, 2009, 16:20 #4 New Member   Raffaele Join Date: Apr 2009 Posts: 3 Rep Power: 9 I agree with justyou..too general question.. There are many factors that you need to evaluate... to start i would look if the formulation of N.S. applies or in other words if you are still in the continuum. ( so check the Kn number for example) Then you may want to check if you're using a Newtonian fluid. then you may need to check if you are compress. or incompress It is possible to simulate most of situation as long as a valid model and enough computational power are available

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