Advanced Design Optimization LLC

Advanced Design Optimization

CFD/Transient Simulations

A transient flow simulation should be performed when all the flow variables change with time. This is also preferable for the evaluation of the interactions between rotating and stationary components of a pump (turbine). For implantable blood pumps (VADs) which usually operate under the pulsatile flow conditions, we can perform the transient flow simulations to help customers fully understand the performance and biocompatibility under realistic conditions likely to occur in the circulation.        

               

    

 

 

    

        

             

 

 

Technology
Blood Pumps
Green Energy
Optimization Cases
Mesh Generation
Steady-State
Transient
Hemolysis
CFD
Transient CFD Simulation with Constant Flow Rate
triangle.gif
FEA
Transient CFD velocity vectors  for centrifugal blood bump with constant flow Transient CFD pressure and pathlines for centrifugal blood bump with constant flow
FSI
(a) Velocity vectors on 0.5-span S1-surface by CFD
(b) Pressure on surfaces and pathlines by CFD
Transient CFD simulation with constant flow rate for a centrifugal blood (industrial) pump showing flow interactions between the rotating impellers and volute
Transient CFD Simulation with Pulsatile Flow Rate
triangle.gif Input fulsatile flow rate Transient CFD velocity vectors for axial-flow blood pump with pulsatile flow
(a) Input pulsatile flow rate Q(t)
(b) Velocity vectors on 0.5-span S1-surface by CFD
Transient CFD characteristic hysteresis Transient CFD pressure and pathlines for axial-flow blood pump with pulsatile flow
(c) Comparison of pump head-flow rate characteristic between steady-state monotonous curve and transient hysteresis by CFD
(d) Pressure on surfaces and pathlines by CFD
Transient CFD simulation with pulsatile flow rate for an axial-flow blood (industrial) pump showing flow interactions between the rotating impellers and stationary stators and the transient pump hysteretic characteristic performance 

Because of our powerful CFD/FEA-based design optimization tools, all the results by steady-state and transient CFD simulations for all the optimized models show high performance and excellent flow match between fluid flow and impeller/stator blades without flow separations and vortices within entire flow domains even under the pulsatile flow condition over a large variation of flow rates with time.

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