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-   -   About the level-set method. (http://www.cfd-online.com/Forums/main/10836-about-level-set-method.html)

maximus February 20, 2006 20:42

About the level-set method.
 
hi,I am trying to use the level-set method to deal with a moving boundary problem. but It's the first time for me to use level-set method ,so I was confused at the first step.The interface in my problem is an arbitrary irregular curve, so how to give the sign distance funtion at the initial time in the whole field,or how to compute the distance from a point to an arbitray curve? I feel it is not an easy task while I can't find any discription on it in the papers I have reviewed. Maybe my problem is not a problem just because I am not familiar with the level-set method. So I appreciate any suggestion and help. Thanks a lot!!

yukai February 21, 2006 02:31

Re: About the level-set method.
 
try to find some important papers, J.A. Sethian, M. Sussman etc. check this out: people.tamu.edu/~yukai/

maximus February 22, 2006 05:13

Re: About the level-set method.
 
thank u for ur response,Mr Yu! I have visited your homepage and found many useful links. Also I found many fascinating results in ur research. Because I am still a beginner in Level set methods, I wonder if I can send mail to u for some suggestions.

yukai February 23, 2006 02:39

Re: About the level-set method.
 
no problem

hydrol88 November 4, 2010 10:16

How to set the initial signed distance function
 
Hi!!! I also have the same problems. I am trying to use the level-set method now. I am confused at the first step for the signed distance function.The interface in my problem is an arbitrary irregular curve, Could you let me know how to give the sign distance funtion at the initial time in the whole field,or how to compute the distance from a point to an arbitray curve? Thanks.. Help me..

valgrinda November 4, 2010 15:33

Initialize Level Set Function
 
For the initialization of the level set function, try this:
1) Give all cells with Phase 1 the level set value +1
2) Give all cells with Phase 2 the level set value -1
3) Reinitialize (see Sussman,1994 and Peng,1999)
Result: Level Set Function is a Signed Distance Function with the Eikonal Equation fulfilled, the zero level set gives the interface between Phase 1 and Phase 2.


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