users of FSI DCI

radiatn · December 1, 2009, 00:41

I'm curious to know how many actual users are doing FSI using the DCI approach? Star-CD with Abaqus?

psutton · December 3, 2009, 04:06

I have been trying to get it working properly for about 6 weeks and have had some success with a simple case of air past a solid baffle. However, I have encountered some stability issues when I tried to introduce a VOF multi-fluid.

radiatn · December 8, 2009, 22:39

Hey thanks! i think it's very difficult because we have to create the moving mesh scripts for a movement yet unknown! In regular moving mesh coding, we the movement is rather simple but for FSI, we dont know yet how it shall move so maybe the MPCCI approach will be more practical? Have you used CFX-FSI, could it be more practical or easier?

psutton · December 9, 2009, 05:37

One of the constraints on my project is to look at FSI methods available within a given company already. This is to assess the feasibility, applicability and current status. So the only methods I can look at for FSI are CEL in abaqus and the direct couple as these are the only codes there is currently available and sufficient company expertise. On of the the recommendations may be to buy new software but for the time being I'm just trying to get these two work. I think the direct couple does the same effective job as MPCCI but all depends on the type of machines you are using to run the jobs (parallel/architecture etc).

I found the mesh morpher to be the best method for the moving mesh. With this you tie the movement to the deflection of some reference surfaces, i.e. the coupled surface. If you have support from CD I would suggest getting the example simulation they have prepared.

December 1, 2009, 00:41	users of FSI DCI	#1
radiatn Member Radiatn Join Date: Mar 2009 Posts: 34 Rep Power: 16	I'm curious to know how many actual users are doing FSI using the DCI approach? Star-CD with Abaqus?

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December 3, 2009, 04:06		#2
psutton New Member Paul Sutton Join Date: Dec 2009 Location: UK Posts: 2 Rep Power: 0	I have been trying to get it working properly for about 6 weeks and have had some success with a simple case of air past a solid baffle. However, I have encountered some stability issues when I tried to introduce a VOF multi-fluid.

December 8, 2009, 22:39		#3
radiatn Member Radiatn Join Date: Mar 2009 Posts: 34 Rep Power: 16	Hey thanks! i think it's very difficult because we have to create the moving mesh scripts for a movement yet unknown! In regular moving mesh coding, we the movement is rather simple but for FSI, we dont know yet how it shall move so maybe the MPCCI approach will be more practical? Have you used CFX-FSI, could it be more practical or easier?

December 9, 2009, 05:37		#4
psutton New Member Paul Sutton Join Date: Dec 2009 Location: UK Posts: 2 Rep Power: 0	One of the constraints on my project is to look at FSI methods available within a given company already. This is to assess the feasibility, applicability and current status. So the only methods I can look at for FSI are CEL in abaqus and the direct couple as these are the only codes there is currently available and sufficient company expertise. On of the the recommendations may be to buy new software but for the time being I'm just trying to get these two work. I think the direct couple does the same effective job as MPCCI but all depends on the type of machines you are using to run the jobs (parallel/architecture etc). I found the mesh morpher to be the best method for the moving mesh. With this you tie the movement to the deflection of some reference surfaces, i.e. the coupled surface. If you have support from CD I would suggest getting the example simulation they have prepared.