{"id":166413,"date":"2022-02-15T11:37:40","date_gmt":"2022-02-15T11:37:40","guid":{"rendered":"\/forum\/forums\/topic\/fluid-structure-interaction-highly-distorted-elements\/"},"modified":"2022-03-22T12:27:32","modified_gmt":"2022-03-22T12:27:32","slug":"fluid-structure-interaction-highly-distorted-elements","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluid-structure-interaction-highly-distorted-elements\/","title":{"rendered":"Fluid structure interaction highly distorted elements"},"content":{"rendered":"
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Hello everyone,<\/p>\n

I am trying to establish an FSI simulation of blood flow inside a flexible aorta and coronary artery model in ANSYS 2022R1. I am receiving the highly distorted element error in the first or second system coupling iterations. I am wondering what are some strategies that I can overcome this error? Below is a recap of my FSI model.<\/p>\n

Domain size has an order of magnitude of ~30 [cm] and the artery wall thickness is 1-5 [mm].<\/p>\n

In Transient structural: Artery wall of linear elasticity of 1 [MPa], Poisson's ratio of 0.49, and density of 1000 [kg\/m3]. I applied Quadratic meshes with ~500k-1000k nodes and ~300k-700k elements.<\/p>\n

In Fluent: Laminar flow of fluid with density of 1060 [kg\/m3], and dynamic viscosity of 0.0035 [Pa.s]. I set the fluid walls as the system coupling. I applied Quadratic meshes with ~500k-1000k nodes and ~300k-700k elements.<\/p>\n

In System coupling: I tried Time steps from 0.001 [s] to 0.0001 [s].<\/p>\n

I can provide more detail if necessary. Thank you for taking the time to consider my question.<\/p>\n

<\/p>\n<\/p>\n

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