yes i have just figured it out after i posted it.I'm gonna try to mesh with filled holes now.Thanks Ali.

Maybe this can help you. This is Diamondx approach. I just try to repeat it. Here the result.

Multiple Pipe In Cylinder Blocking

Here files:

https://www.dropbox.com/s/0blxqh8z2p...20Cylinder.rar

@javi,
Good video, thanks for sharing this !

Hi Mistigh
in your uploaded picture, you did not block the nozzle of exchanger.
for blocking you should be split nozzle block
http://8pic.ir/images/95435552099944766571.jpg
so, after this step you can split block for the tubes.
for delete block go.... blocking menu\delete block

Hey guys,

I have been trying to mesh this geometry with nozzle nowadays.I know it should not be that hard yet it is hard to figure it out what is going on as a begineer tbh.So i have done this blocking (below) many times and i only got one successful mesh at all.So here question is,is there any further ways to improve this mesh better,(i alrdy tried smooth mesh)?All suggestions would be appericiated.

http://imagizer.imageshack.us/v2/800...0/600/m7jd.jpg