The Design – Blood Flow Simulation in Coronary Artery | ANSYS Fluent
The circulatory artery system continuously flows into the capillaries almost without fluctuations. The circulatory system plays a role in the transmission of substances. Due to the functioning of the circulatory system, food is needed to reach into the cells. On the other hand, oxygen is supplied by the cell and carbon dioxide is collected from the body.
The circulatory system consists of three parts of the heart including arteries, veins, capillaries, and blood. Blood is a non-Newtonian fluid with a density of 1060 kg/m3. It has been modeled as a non-Newtonian fluid similar to the Carreau equation. Blood movement is intermittent and pulsatile. To simulate the motion of blood a UDF code has been generated for this problem.
In this analysis, it has been tried to simulate and analyze blood flow simulation in the coronary artery using the ANSYS Fluent software.
Geometry & Grid
The geometry required for this analysis has been generated by ANSYS Design Modeler software. The meshing required for this analysis is also generated by ANSYS Meshing software. The volume properties of the geometry model for blood flow simulation in the coronary artery design modeler geometry are 1,9721e-005 m³.
In this analysis, the k-epsilon (2 equation) turbulence viscosity model is used to check the fluid flow. The standard wall function is used near the wall.
The flow input for blood flow simulation in the coronary artery design modeler geometry for this analysis is considered as Velocity Magnitude and is 0.3 m/s. The turbulence of the design modeler is set with an intensity equal to 5 %. The turbulence viscosity ratio of the design modeler is set with a viscosity ratio of 10.
The flow output range is also considered as a pressure outlet for the flow output region and gauge pressure is equal to 0. The inner wall is also considered a Stationary Wall.
Discretization of Equations
To solve the equations in this analysis, the Simple algorithm is used to solve coupling speed and pressure equations. Also, a pressure-based solution for flow resolution is used. In the end, the results are shown as contours of velocity, temperature, and isosurfaces.
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