One way FSI and Two Way FSI

vigneshkrish333 · February 24, 2020, 05:12

Can Anyone explain the difference between the One Way FSI and Two Way FSI?
Because I am working on a project which deals with a Pulsating Pressure Flow of Gas inside the Pipeline. To do so I am in the requirement of the the above difference!!!

Thank you..

LuckyTran · February 24, 2020, 10:51

In one-way FSI, you start by assuming your body is absolutely rigid. You do CFD and get a flow solution around your body and you record the pressure on its surfaces over time. You then take these pressure forces now as a boundary condition for your structural solver and solve the solid mechanics problem and watch the body deform under the load.

In two-way FSI, every time-step you solve the flow, you solve for how this deforms the surface, then you update the geometry in the CFD. In two-way FSI, you can capture how the deformation of the body affects the flow.

February 24, 2020, 05:12	One way FSI and Two Way FSI	#1
vigneshkrish333 New Member Vignesh Join Date: Feb 2020 Posts: 19 Rep Power: 6	Can Anyone explain the difference between the One Way FSI and Two Way FSI? Because I am working on a project which deals with a Pulsating Pressure Flow of Gas inside the Pipeline. To do so I am in the requirement of the the above difference!!! Thank you..

February 24, 2020, 10:51		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	In one-way FSI, you start by assuming your body is absolutely rigid. You do CFD and get a flow solution around your body and you record the pressure on its surfaces over time. You then take these pressure forces now as a boundary condition for your structural solver and solve the solid mechanics problem and watch the body deform under the load. In two-way FSI, every time-step you solve the flow, you solve for how this deforms the surface, then you update the geometry in the CFD. In two-way FSI, you can capture how the deformation of the body affects the flow. Last edited by LuckyTran; February 24, 2020 at 10:56. Reason: ffs quit making duplicate posts