Hi,
I am using CT/MRI data for 3D modelling. I have modelled 3d File for simulation , i want to know FSI simulation setup on ansys fluent.
As in cardiovascular applications the wall is very compliant, numerical flow computations using a fixed wall assumption will only yield limitedly useful results. A change in blood pressure and blood flow will alter the deformation of the wall and such a deformation of the lumen will determine the flow and pressure field. Indeed, in cardiovascular numerical models it is essential to take this fluidstructure interaction (F SI) in account when constructing a numerical model in order to obtain reliable results. Therefore, the aim is to develop a multipurpose fluid-structure interaction code, applicable for vascular applications. A method was proposed to perform multipurpose vascular flow calculations where the interaction between the blood flow and the vessel wall was taken into account. To achieve this a partitioned solver approach was chosen, a commercially available fluid and structural solver were embedded in an own-written coupling program. For the computational fluid dynamics problem Fluent software (ANSYS, Inc.) was chosen and for the computational solid mechanics Abaqus software (Simulia, Inc.) was used. Stabilizing the coupling was obtained by coupling reduced order models iteratively.
The aneurysm study highlights a severe limitation of biomechanical fluidstructure interaction approaches: they are very time consuming, limiting their applicability in clinical practice. Moreover, as they are so time consuming the size of the problems studied needs to be limited. Therefor work should be focusing on optimization of the F SI-approaches. A first optimization can be done by improving the interpolation method to match the results from the wet and dry side of the interface. This adaptation will allow the use of meshes where the nodes on either side of the interface do not match, hence fluid and solid meshes of different density can be used and each subproblem can be meshed with an optimal mesh, thus reducing the computation time.
I would suggest to refer to the following file as an example:
I firstly prepared for an experimental device which is similar to the human vascular structure to prove a mathematical algorithm for an aneurysm. The pumping of pseudo-cardiac organs (glycerin) in the distilled water periodically repeated the contraction and expansion process, resulting in a structure that circulates through the ascending aorta, Iliac artery and subclavian artery) of the silicone product at a distance from the heart. The transfer function was derived from the pressure obtained at two points on the artery to demonstrate the logic to detect aortic aneurysms. I hope that your question will help me.
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