The Tecplot website now contains an case study of MIT researchers using CFD simulations to simulate blood flow through vessels, and using it to design better stents.  Of course, once the simulations are done they use TecPlot for the visualization and analysis.

The simulation yields numerically formatted results, however, making it difficult or impossible for the human brain to interpret. This is where visualization comes in. Using the Tecplot 360 CFD visualization tool, Dr. Edelman and Dr. Kolachalama successfully generated visuals that showed them how the artery and drugs would behave under different conditions — similar to looking at the visual results from an X-ray or video scope.

via Case Study: MIT researchers use CFD visualization to create safer, more innovative stents.