Mutiple Edge problem
 

dear all,

I tried to make a room which adjacent to the outside environment(use a Big box instead) to simulate a HVAC problem, but somehow the blue lines in the prcture show those edges have 3 surfaces meeting and when i tried to mesh it using tetra mesh the mutiple edge problem came. how could I solve this problem?

thanks!

In your problem I think you have created 2 body points, so the edge that meets the two zones have three faces and it is shown in blue color.
In your meshing definitely there will be multiple edges, actually multiple edges are not an error unless it occurs in unnecessary places.

Regards,
Mohan.G

But when i checked the mesh, it showed:
Running diagnostics for Multiple edges in subset "all"
228 problems were found for Multiple edges.
Is this ok?

For your case the multiple edges will be there and it is not a problem.

possible problems.
 

Correct. For most solvers, multiple edges (where intended) are not a problem. But for some solvers, or when you don't expect them, they can be a problem. This is why they are listed in the checks under the "possible problems" column.

I would add to Mohankumarg12's reputation, but the button says I have done it too much already.;)