Mixing efficiency

Analysis of mixing Tee

In the following challange I performed sinuation on long pipe and short pipe.

Initially I uploaded the file and in mesh generated a mesh of 0.002 m elements for both the pipes.I tried to run simulation by both turbulence models.But I found epsilon model better than omega model because its better to use epsilon model when one want simulations away from the boundary.When one want to know about happenings near the pipe and fluid boundary shear stress plays a role and its better to use k omega turbulence model.

After this step I set the parameters as given above in task.And then I ran the simulations for 150 iterations.In both the cases I found the temprature was reduced to around 27.5 C.I have also inserted the table in result in long pipe file which I have uploaded below.

When I increased the velocity of cold inlet fluid,I found that the temprature was reduced to 26.8 c.But when I increased it to 4 times it reduced to 24.2 c.I noticed the same results for long pipe.

Also in short pipe I reduced the mesh size and I found results better.