Right ventricular failure caused by myocardial infarction may be refractory to treatment designed to support the systemic ventricle. A new type of right ventricular assist device driven by an impeller pump was successfully used for 79 hours after emergency revascularisation after right coronary occlusion. Despite renal failure requiring haemofiltration the patient has now fully recovered.

Rapid changes in the performance-related parameters of a pump during its startup operation lead to large pressure fluctuations and structural vibrations it. In view these problems, this study investigates evolution cavitation characteristics under centrifugal startup. We use finite volume method simulate dynamic process. To characterize acceleration, we assume that rotational speed rate flow ar...

RESEARCH ARTICLE Intensifying the Fermentation of Aspergillus oryzae in a Stirred Bioreactor Using Maxblend Impeller Narges Ghobadi, Chiaki Ogino and Naoto Ohmura Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe Univer...

the growth rate of stem cells in mobius cellready 3l bioreactor has been studied using comsol multi-physics simulation software in order to find out the best operational parameters for secure cell growth. the bioreactor geometry was defined according to the emd millipore issued information while turbulent and unsteady state solid-liquid 2-phase fluid flow equations were used for modelling the b...

Honey bees (Apis mellifera) are remarkable fliers that regularly carry heavy loads of nectar and pollen, supported by a flight system - the wings, thorax and flight muscles - that one might assume is optimized for aerial locomotion. However, honey bees also use this system to perform other crucial tasks that are unrelated to flight. When ventilating the nest, bees grip the surface of the comb o...

Abstract Impeller discharge flow plays an important role in centrifugal compressor performance and operability for two reasons. First, it determines the work factor relative diffusion impeller. Second, sets into downstream stationary system. The choice made preliminary design phase impeller exit velocity triangle is crucial a successful design. state-of-the-art approach determining relies on se...

The main limitation of centrifugal pump running in turbine mode is lower efficiency at part load operating conditions as compared to conventional hydro turbines. To enhance the utilization of pump as turbine (PAT) in mini/micro hydropower plants, it is very important to improve its performance with some low cost modifications. The part load efficiency of PAT can be improved by guiding the flow ...

Cavitation is regarded as a considerable factor causing performance deterioration of pumps under off-design conditions, especially at overload conditions. To investigate the unsteady cavitation evolution around tongue pump volute, and its influence on flow field within passages impeller, numerical calculations several hydraulic tests were performed typical centrifugal with shrouded impeller. Em...