[sooraj546]

The size of the entire geometry is about 2.7 m dia but the inlet tubes are of 5.5 mm dia only i and not able to mesh it properly .

Even though
orthogonal 0.85
skewness 0.24 are coming.

Due to the odd surface of the tubes shown below the temp developed are causing problems. I want it to be meshed without any deformation in surface without compromising the no of elements much. kindly help me out with this

[siw]

The mesh is too coarse on those tubes. Use a finer mesh size locally. Also do you need to model near wall gradients? Thus, requiring inflation layers.

[sooraj546]

Thanks a lot for that reply, it really helped me a lot.

Now i have refined it to such an extend that the inlet tubes looks ok more structured but i need to confirm with an expert if its really ok.

I have attached the figures with the , Kindly have a look at it.

orthogonal quality is 0.82
skewness 0.294

which i think is ok for such a complicated diagram.......what do u think sir? I have attached the meshing techs which i have used with this reply too. Kindly help me out............


thanks i advance for the reply

[siw]

If fluid is flowing along those tubes then there are not many elements to capture the physics. But you have not said anything about the simulation in order to determine an appropriate mesh. If you can run a preliminary simulation and see what your results are, then you can determine if the mesh is suitable or not and you can make the required changes.

[sooraj546]

Originally Posted by siw

If fluid is flowing along those tubes then there are not many elements to capture the physics. But you have not said anything about the simulation in order to determine an appropriate mesh. If you can run a preliminary simulation and see what your results are, then you can determine if the mesh is suitable or not and you can make the required changes.

Sir,
Those are fuel inlet tubes, fuel is sprayed with constant velocity to the furnace through them. I dnt have to capture any velocity change along the tube that's why i meshed it like that , but i have a problem with the simulation result.

In the velocity profile obtained using this mesh fig.11 on the left side (attached) i am not getting a prominent flame front velocity as the actual simulated velocity profile as shown in fig 10 (attached) figure on the right side. Is this due to meshing oR physics problem ?

Kindly help me out sir,

THANKS A LOT IN ADVANCE