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Old   July 26, 2005, 02:50
Default Where to start?
  #1
Kapil
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Well, I would really appriciate if anyone of you(i believe all of you) would help me start with CFD. I have basic introductory books on CFD and Numerical Analysis. What Next? Being a college student, we aren't exposed in details to this subject. Reply ASAP.
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Old   July 26, 2005, 03:05
Default Re: Where to start?
  #2
zxaar
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if you are in india , you can do one thing, go to market and buy " computational methods for fluid dynamics" by peric. if u r outside of india then also you can buy it, only thing is in india its pretty cheap , i bought it new for 400 rs that is around 8 euros or 9 dollars.

then the obviuos thing is to start reading it, but if you really wanna learn anything, it is good idea to keep yourself a small project, like a 2D lid driven cavity etc, and work on it. once you work with a goal in mind, then you learn a lot.

apart from this, i am sure you will get lot of advice
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Old   July 26, 2005, 10:19
Default Re: Where to start?
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Andrew Hayes
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I'd start with a 1-D SS flow between two plates, and work on making the NS equations descrete. The nice thing with the 1-D SS problem is that you can compare your output of the CFD to an exact solution. Then, maybe, you can non-dimensionalize the above problem. Then, move to the lid problem mentioned by zxaar.
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Old   July 26, 2005, 10:50
Default Re: Where to start?
  #4
M
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I started from Smith-Hutton task

I can send code to You
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Old   July 28, 2005, 06:47
Default Re: Where to start?
  #5
Kapil
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Well, I told you i'm a beginner, half the things you people spoke of, especially Mr. Andrew Hayes, was greek and latin for me.

Regarding Peric, i do have that book, it's good but i prefer Anderson and a book from Pearson's education, Introduction to CFD.

Well I expect if someone could explain to me how basically things work, in a more simple way. Anyone from India, would be of great help cause I could even call them up for clearing my doubts.

Thank you for your help zxaar, Andrew and M
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Old   July 28, 2005, 14:21
Default Re: Where to start?
  #6
Vinod Dhiman
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Which Anderson are you reading. Is it John Anderson (Jr.) or Dale A Anderson. If it is by Dale, then don't read it now, its advanced one. Use the book by Suhas V Patankar, its only basic, nothing else. You can even write a code using this book, if you know any language. You can contact me in case of any difficulty. I am in Bangalore.
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Old   July 28, 2005, 16:39
Default Re: Where to start?
  #7
M
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Dear Kapil, I will send to You my code with Smith-Hutton Problem

Main features

1) First of all the computational domain is covered with mesh (in that case it will be uniform cartesian mesh)

2) then coefficients of general transport equation are calculated

3) after that begins iterative process of solving system of linear equations (TDMA method is used)

4) boundary conditions is applied (I made them separately)

code written in FORTRAN90 standard, and I hope it easy for understanding.

-----------------------------------------------------

Smith - Hutton problem is the second level task for beginner.

I suppose it's better for You to solve first simple diffusion equation (1D or 2D).

See also list of links to CFD courses

http://www.cfd-online.com/Forum/main...cgi?read=37970

I guess from pictures presented there You can understand the main goal of CFD and possible ways to reach this goal. It's rather good methodical material.

I can recommend to see course by David D. Apsley, slides by Hamn-Ching Chen (CVEN)

---------------------------------------------------

If You will have any questions, feel free to ask.
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Old   July 29, 2005, 11:39
Default Re: Where to start?
  #8
Andrew Hayes
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well, get your Fluids book and look up Couette flow. That will take you to the subject of flow between two plates, except with couette flow one of the plates is moving. In any case, your book should show you the steps to deriving an exact solution, which you can program into Excel or MathCAD. Then, you have to know how to make your equations discrete, and also determine what kind of method you want to use - being finite element, finite volume, etc. Finite element is pretty easy in a one-dimensional case, in which you are just averaging the values before and after. But, the 1-D case, Steady-state, is easy to do. You might not have gotten to non-dimensional stuff yet, but it is a good practice problem to work on doing it to. So, basically, you will have one Navier-stokes equation in the x-direction with a lot of the terms gone b/c of the steady state and constant properties. Then, you just have to solve it by making the partial derivative into algebraic equations which will give you a matrix to solve. You can find a lot of beginner stuff on the web if you do a search. I can send you my MathCAD code for SS 1-D flow if you have MathCAD so you can get an idea.
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