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Blood Flows

Fluid-Structure Interaction: Deforming Membranes

FLOW-3D has a deforming membrane model that can simulate fluid structure interaction. This model can be used, for example, to simulate blood flow in arteries as shown below. Fluctuation of the solid creates pressure waves that propagate through the nozzle and eventually eject liquid out of the nozzle (upward in this case). In the deforming material, each computational cell has a spring constant normal to the surface. This value can be assigned per solid object imported into FLOW-3D. The General Moving Object model is used to simulate the motion of the actuator, which can be prescribed or coupled to move with according to pressure fluctuations.

Each mesh cell uses a spring constant.
In this simulation, blood, a non-Newtonian fluid, can be modeled using FLOW-3D through narrow arteries and veins to determine pressure balance and flow rates should there be a blockage. CFD simulation aids in circulation improvement for placement of stents, grafting procedure to eliminate blockage, and bypass surgeries.