please help me for general description of CFD

Jiyeon · April 6, 2009, 21:15

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.

justyou · April 7, 2009, 02:42

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...

majidbahari · April 7, 2009, 07:31

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.

sarium · April 7, 2009, 17:20

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

April 6, 2009, 21:15	please help me for general description of CFD	#1
Jiyeon 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 21:34.

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April 7, 2009, 02:42		#2
justyou New Member Philip C. Join Date: Apr 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, 17:20		#4
sarium New Member Raffaele Join Date: Apr 2009 Posts: 3 Rep Power: 17	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