Prof. Dr. Salim Khalifa Kazem from Control and Systems Engineering Department  at the University of Technology published a joint scientific research with a group of researchers entitled "Numerical verification of the effect of vibrations induced by blood flow on artificial heart valve diffusion through the use of liquid structure reaction structure Scoopas Journal International under Thomson Reuters.

Research focuses on surgeries to replace the most common artificial heart valves often used due to failure of the artificial heart valve. Determining the cause of failure and finding appropriate solutions requires deep knowledge about the behavior of the artificial heart valve and operation. The causes of the valve failure are related to the patient's body and the design of the valve. With human body with blood flow dynamics and materials used to manufacture valve. When the blood flows through the arteries and valves, blood activates forces in the components of the valve, causing induced vibrations caused by the flow, which may lead to valve damage. In this study, fluid structure interaction techniques were used to analyze fluid dynamics to investigate the effects of simulated vibrations To obtain optimal design for shear stress, shear stress was calculated from the artificial heart valve contact pin and compared with the shear stress of the contact pin in the literature. In the Reynolds number of 250, excitation frequencies increased from 94.24 rad / s to 126.9 rad / s, resulting in a 75% increase in shear stress values ​​in the pin-contact valve at a completely closed angle of 85 °. The increase in frequency may cause a ringing phenomenon that will cause damage to artificial heart valve components, and then, the blood components will also be damaged, causing increased blood clotting occurs downstream of the artificial heart valve.