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-   -   BIg BIg Problems....SUPERSONIC FLOW OVER A FLAT PL (http://www.cfd-online.com/Forums/main/10051-big-big-problems-supersonic-flow-over-flat-pl.html)

 edison October 9, 2005 21:44

BIg BIg Problems....SUPERSONIC FLOW OVER A FLAT PL

hi there, i'm edison from Malaysia. i'm facing the big problem now....i'm asking to develop the program. But the problem is i even cant get the finite-difference equation to write the source code in C++ language.... so i need ppl give help now.... the quetions i have is about the SUPERSONIC FLOW OVER A FLAT PLATE: NUMERICAL SOLUTION BY SOLVING THE COMPLETE NAVIER-STOKES EQUATIONS. i'm using the Maccromack method to solver this problems. the finite-difference eq. was so complicated... its include the second-order of partial differeciation TAUyy,TAUxx,TAUyx..... so can u give me some guide??

below is the link to the questions. http://s6.yousendit.com/d.aspxid=39B...R2X0WJL5KG31MO thanks for help...i appreciate so much....

 buch October 10, 2005 01:40

Re: BIg BIg Problems....SUPERSONIC FLOW OVER A FLA

Hi,

Anyway, your problem is a classical one, and is not considered a BIG BIG one ;)

It corresponds to the chapter 10 of http://www.cfd-online.com/Books/show_book.php?book_id=3

Regards

 edison October 10, 2005 05:54

Re: BIg BIg Problems....SUPERSONIC FLOW OVER A FLA

thanks for rely Buch.... but i stil dono wat to do with the second-order partial differenciation la... also i dono how to call function during writing the program... could u help me>? or any other have done the questions in Chapter10 before?? i wan the solution for the finite difference eq. so that can start write the programme..... thank alot

 buch October 10, 2005 06:23

Re: BIg BIg Problems....SUPERSONIC FLOW OVER A FLA

Hi,

1) for the 2nd order differenciation, everything is explained before in the book. You can find some examples of codes on the web, especially simple ones to see how a discretized equation is coded, like in http://www.sali.freeservers.com/engi...cfd_codes.html

2) to call a function/subroutine etc. it depends on the language you are using. Try first to set up a very small program, to see how to call a function and to pass arguments from a function to another.

3) if you are waiting for "the solution ", you may wait for long, you'd better try first to do it by yourself, then try to ask your course-mate and/or teacher ...

Good luck

 edison October 10, 2005 23:26

Re: BUch and other...can help me check??

i've try to derive the equation as below....(get in the link) http://s25.yousendit.com/d.aspxid=0Z...Q1UMHBUYIYRYV8 can u help me check is that correct? another question is .....is that we need to do the call fucntion for MIU and LANDA also?? thanks a lot hope u reply soon.....:)

 buch October 11, 2005 08:27

Re: BUch and other...can help me check??

Hi edison

 edison October 11, 2005 09:20

Re: hi BUch ...this is the link again....

http://s22.yousendit.com/d.aspx?id=2...23HJCCYG5B0WJQ

 diaw October 11, 2005 09:34

Re: hi BUch ...this is the link again....

Edison,

To be rather honest... those equations are no big deal to set up. Get hold of a good CFD book - eg. Anderson, as suggested by someone & go through the learning exercise. you will thank yourself in the end.

You can even do a rough setup in Matlab.

diaw...

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