Block interface boundary conditions for multiblock
Hi! everyone.
I am in developing a 2D FDM flow solver with multi-block grid capability. serially-linked or parallelly-link grids are solved with no difficulties. But for grids with singularity, like backward-facing step cornder, I have a problem to appose boundary condtition at corner points. I wrote a code that one boundary condition imposed at one boundary. And used ghost cell to interchage block-to-block information. So, if backward-facing step problem is considered, I use 3-blocks grid. hence, there is one singularity corner point..... see the fllowing fig. ----------------------------- 1 | 2 | ------ (1)------------------- | 3 |----------------------- i meshed the problem like above fig. for block1,3, no-slip bc imposed at point (1). but, I don't know what bc is implemented at point (1) for block 2 computation. please, give me a change to see the world of CFD..... thanks in advance. |
Re: Block interface boundary conditions for multib
Dear Hyun,
If I understand your prob. correctly, pl. do the following. First look at the figure: ~~~~~[1]~~~~~[2~~~~~Z~~~~~2]~~~~~[3]~~~~~ Take the blocks in this manner and I hope "ghosts" will not trouble you!! I mean, make the corners or step, represented by "Z", internal part of the block [2]. Which means, corners you will be handling in the same manner as we do in a single block grid. Kindly correct me if I am wrong. It was difficult to draw a good figure. I could not understand yours figure also!!! GS |
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