BACKGROUND Published studies of the past decades have established that mass transfer across the dialyzer membrane is governed by diffusion, convection and osmosis. While the former is independent of the pressure in the liquids, the latter two are pressure dependent and are enhanced when the pressure difference across the membrane is increased. The goal of the present study is to examine the imp...

The development of electrostatic potentials generated during cardiopulmonary bypass (CPB) procedures using polyvinylchloride (PVC) tubing in conjunction with roller pumps has been previously documented. The resulting damage from the electrostatic discharge (ESD) has been reported to affect gas transfer devices, but details of potential damage to electronic components commonly used during extrac...

The outlet angle and shape of impeller blades are important parameters in centrifugal pump design. There is a lack detailed studies related to double curvature impellers pumps the current literature; therefore, an experimental numerical analysis was performed. Six were made then assessed test bed simulated via 3D CFD simulation. original also tested simulated. One manufactured had same design a...

The non-uniform inflow caused by the elbow inlet is one of main reasons for low actual operation performance a centrifugal pump. Orthogonal experiment and GA_PSO algorithm are used to improve head efficiency pump with an based on method combining numerical simulation prototype in this paper. effects design parameters, including radius ratio, blade angle, number, wrap outlet impeller diameter, w...

This paper investigates the optimal design of water distribution networks without storage capacity using mathematical optimization. Both micro-genetic algorithm and hydraulic simulation network are used to find diameters pipes network. The single-objective function optimization problem is total cost capital costs piping pump, operating under fulfillment minimum nodal pressure requirements. An m...

The risk of air emboli is a concern for all perfusionists. A new clamping device for use with centrifugal pumps is designed to clamp both the arterial and venous lines at the first indication of air or retrograde flow, thereby allowing the perfusionist to evaluate the situation and correct the problem before entraining air into the arterial pump head. After evaluating this device in our lab, we...

The inducer is often used to prevent cavitation in a centrifugal pump. However, it may lead deterioration of the performance pump when poorly matched with impeller. Numerical simulations are employed study effects matching, specifically, axial space and circumferential deflection between impeller, on performance. results show that destroys rotational symmetry velocity distribution at inlet resu...

For a high-speed centrifugal pump, cavitation occurs easily. To equip high-performance splitter-bladed inducer upstream of the pump is an effective method to suppress cavitation. In this paper, external characteristics experiment with carried out, and corresponding numerical calculations are completed. The research shows that results calculation credible. Numerical under eight different tip cle...