A5028623982- Mechanical Circulatory Support Devices
- Cavitation Phenomena in Pumps
- Turbomachinery Performance and Optimization
- Fuel Cells and Related Materials
- Fluid Dynamics and Turbulent Flows
- Cardiac Structural Anomalies and Repair
- Refrigeration and Air Conditioning Technologies
- Plasma and Flow Control in Aerodynamics
- Probabilistic and Robust Engineering Design
- Cardiovascular Function and Risk Factors
- Computational Fluid Dynamics and Aerodynamics
- Hydraulic and Pneumatic Systems
University of Rostock
2018-2021
Purpose: Numerical flow analysis (computational fluid dynamics) in combination with the prediction of blood damage is an important procedure to investigate hemocompatibility a pump, since trauma due shear stresses remains problem these devices. Today, numerical conducted using unsteady Reynolds-averaged Navier–Stokes simulations. Investigations large eddy simulations are rarely being performed for pumps. Hence, aim study examine viscous simulation pump and compare results simulation....
The blood damage prediction in rotary pumps is an important procedure to evaluate the hemocompatibility of such systems. Blood caused by shear stresses cells and their exposure times. total impact equivalent stress can only be taken into account when turbulent are included prediction. aim this article was analyze influence on a pump's flow. Therefore, flow research pump computed using large eddy simulations. A highly turbulence-resolving setup used order directly resolve most stresses....
Numerical flow simulations that analyze the turbulent characteristics within a turbopump are important for optimizing efficiency of such machines. In case ventricular assist devices (VADs), must be also examined in order to improve hemocompatibility. Turbulence increases shear stresses VAD flow, which can lead an increased damage transported blood components. Therefore, understanding patterns and their significance numerical prediction is particularly optimizations VADs identify thus...
Cardiovascular engineering includes flows with fluid-dynamical stresses as a parameter of interest. Mechanical are high-risk factors for blood damage and can be assessed by computational fluid dynamics. By now, it is not described how to calculate an adequate scalar stress out turbulent flow regimes when the whole share turbulence resolved simulation method this impacts calculation. We conducted direct numerical simulations (DNS) test cases (a channel FDA nozzle) in order access all scales...
Adverse events due to flow-induced blood damage remain a serious problem for pumps as cardiac support systems. The numerical prediction of via computational fluid dynamics (CFD) is helpful tool the design and optimization reliable pumps. Blood models primarily are based on acting shear stresses, which calculated by solving Navier–Stokes equations grids. purpose this paper analyze influence spatial discretization associated error stress calculation in pump comparison other important flow...
Flow losses are unavoidable present in a turbomachinery. In order to improve the efficiency, must be adequately analyzed, e.g. numerical simulation. this context, paper presents procedure, by which numerically determined flow can examined detail. First, turbomachine (axial pump for cardiac support) was simulated using large eddy simulation and it verified that over 90% of mean field were directly resolved. Afterwards, relevant losses, namely direct dissipation turbulence production,...
The dissipation rate in a flow is measure of the transition from mechanical energy to internal and thus represents loss for flow. For this reason, it useful investigate high rates when optimizing turbo pumps, identify areas where lost pump Nowadays, optimizations are carried out with help numerical computations mostly simulation methods as URANS used optimization. special feature occurs these unsteady that total consist three terms, direct, resolved turbulent modeled component. In context,...