Adjoint - topology optimization - custom control volume

bramv101 · May 3, 2013, 06:03

All,

I would like to optimize the pressure loss of a duct through morphing its topology.
Is there a way i can use the adjoint solver in combination with a custom control volume?
Or is adjoint not even the way to go?

bramv101 · May 16, 2013, 07:25

Nobody an answer on this one?

revilo82 · May 17, 2013, 01:55

Hi bramv101,

you can do topo optimization with Fluent Adjoint Solver:

1. CFD & AS run
2. Find relevant min/max values for the 'Adjoint Flow Blockage' by Contour Plot and mouse probe
3. Mark the cells with ADAPT/ISO VALUE by using 'Adjoint Flow Blockage' variable
4. If you cannot mark the cells (zero cells marked) use the following Scheme command: (%free-parents)
5. Visualize the marked cells (Adapt Manager)
6. Separate marked cells by MESH/SEPARATE/CELLS
7. Delete the new cell zone(s) by MESH/ZONE/DELETE

You can only create the parallelepiped control volume. For topo optimization you don't need this feature.

bramv101 · May 27, 2013, 06:07

Revilo,

correct me if i understood wrong:
1. import my dimension envelope
2. run cfd+as
3. find my min-max values (is this determined on gut feeling?)
4. select all cells that i want to see removed (based on min/max values)
5. remove cells and rerun on newly formed domain
6. optional: export this new domain as guideline for the CAD designers

honestly I have no clue on how to actually do step 3+4+5?
Would you see it possible to get me some screenshots?

May 3, 2013, 06:03	Adjoint - topology optimization - custom control volume	#1
bramv101 Member TonyD Join Date: Apr 2009 Posts: 85 Rep Power: 18	All, I would like to optimize the pressure loss of a duct through morphing its topology. Is there a way i can use the adjoint solver in combination with a custom control volume? Or is adjoint not even the way to go?

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May 16, 2013, 07:25		#2
bramv101 Member TonyD Join Date: Apr 2009 Posts: 85 Rep Power: 18	Nobody an answer on this one?

May 17, 2013, 01:55		#3
revilo82 New Member Join Date: May 2013 Posts: 7 Rep Power: 13	Hi bramv101, you can do topo optimization with Fluent Adjoint Solver: 1. CFD & AS run 2. Find relevant min/max values for the 'Adjoint Flow Blockage' by Contour Plot and mouse probe 3. Mark the cells with ADAPT/ISO VALUE by using 'Adjoint Flow Blockage' variable 4. If you cannot mark the cells (zero cells marked) use the following Scheme command: (%free-parents) 5. Visualize the marked cells (Adapt Manager) 6. Separate marked cells by MESH/SEPARATE/CELLS 7. Delete the new cell zone(s) by MESH/ZONE/DELETE You can only create the parallelepiped control volume. For topo optimization you don't need this feature.

May 27, 2013, 06:07		#4
bramv101 Member TonyD Join Date: Apr 2009 Posts: 85 Rep Power: 18	Revilo, correct me if i understood wrong: 1. import my dimension envelope 2. run cfd+as 3. find my min-max values (is this determined on gut feeling?) 4. select all cells that i want to see removed (based on min/max values) 5. remove cells and rerun on newly formed domain 6. optional: export this new domain as guideline for the CAD designers honestly I have no clue on how to actually do step 3+4+5? Would you see it possible to get me some screenshots?