[reza67]

hi everyone
i'm silulation an U-pipe which containing a fluid and both of them are in the soil. so there is three part (2 solids and a fluid)

the pipe has a small thickness. is there anyway to don't mesh the pipe and only assume it's conduction is ansys fluent ?
i try to use shell conduction but because of conjugate heat transfer i couldn't use that . is there anyway else ?

thanks

[reza67]

no idea ?

[macfly]

Hi,

Your question is grammatically hard to understand, maybe that's why you got no answer.

If I understood well, I think you can define a wall thickness, make sure the wall material is set to the pipe material.

[reza67]

Originally Posted by macfly

Hi,

Your question is grammatically hard to understand, maybe that's why you got no answer.

If I understood well, I think you can define a wall thickness, make sure the wall material is set to the pipe material.

thanks for your answer macfly .
i want to simulate a geothermal u-pipe
there is pipe which containing a fluid and they place in the soil vertically
when i ignore the pipe body and only assume the fluid and the soil, process will converge after under about 180 itrate per time step but when i draw u-pipe body and mesh it, process does't converge even after 10000 iterate per time step . i don' know what's the reason ?
so i decided to use shell conduction for a u-pipe and and doesn't solve it and only assume it's conduction. but when i use the shell conduction conjugate heat transfer between the water and soil doesn't occure ( i give a heat flux to the outer wall of soil . the conduction in the soil occur but the convection in the water doesn't occur !) i can't use the interface boundry condition in the walls of the water and soil because then i couldn't use the shell condoction for those walls

could you help me about this ?

[macfly]

Did you try the simpler thin wall/thermal resistance approach? No need to geometry/mesh the pipe thickness with this approach. https://www.sharcnet.ca/Software/Flu...l_outside_temp

[reza67]

Originally Posted by macfly

Did you try the simpler thin wall/thermal resistance approach? No need to geometry/mesh the pipe thickness with this approach. https://www.sharcnet.ca/Software/Flu...l_outside_temp

thanks macfly
could you explain more about this ?
but i think it's conduction is in 1 direction only . is it right ?

[macfly]

Originally Posted by reza67

could you explain more about this ?
but i think it's conduction is in 1 direction only . is it right ?

I can't explain it better than the User's Guide or any other text you can find in a basic heat transfer book. http://www.engr.colostate.edu/~allan...ge5/page5.html