Authors: Rajesh Bhaskaran & Sebastien Lachance-Barrett, Cornell University

Bifurcating Artery

Created using ANSYS 14.5

Geometry

Geometry (Artery without plaques) 

Geometry (Plaque configuration #1)

Geometry (Plaque configuration #2)

Geometry (Blood Clot)

Mesh

Some of the settings you can use to get a better mesh are shown in the figure below.

• The Relevance Center can be set to coarse, medium and fine. After you pick the Relevance Center, you can change the Relevance from -100 to 100, with 100 being the finest within the particular relevance center.

You can insert a sizing for faces and edges along with the mesh settings in the figure.

You can give a bias to edge sizing to cluster cells towards one end of edge. See this page for how to implement a bias to an edge.

Below is a mesh we obtained by playing with these settings. This mesh resolves the separated flow behind the plaque better than the default mesh. It can be further improved though! You could start by changing the "edge sizings" in the left branch.

Streamlines

The following videos show how to plot streamlines using the CFD Post post-processor included in ANSYS Workbench. First, we plot streamlines emanating from the the inlet.

The streamlines emanating from the inlet do not include those in the recirculating region or the "deadwater" region. To see the streamlines in the recirculating region, we:

• Create points along a line within the recirculating region
• Plot streamlines emanating from these points
  
  
  

Wall Shear

The following video shows how to plot wall shear along the left wall of the bifurcating artery.

Pressure Gradient

The procedure to create a contour plot of the pressure gradient is shown in the video below.

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