Improving the hydrodynamic performance of diffuser vanes via shape optimization

Improving the Hydrodynamic Performance of Diffuser Vanes via Shape Optimization

The performance of a diffuser in a pump stage depends on its configuration and placement within the stage. The influence of vane shape on the hydrodynamic performance of a diffuser has been studied. The goal of this effort has been to improve the performance of a pump stage by optimizing the shape of the diffuser vanes. The shape of the vanes was defined using Bezier curves and circular arcs. S...

Hydrodynamic Lubrication of Sliding Vanes

A Review on the Drag Reduction Methods of the Ship Hulls for Improving the Hydrodynamic Performance

Hydrodynamic performance of a marine vessel mainly depends on the frictional and pressure resistance. Pressure drag reduction could be achieved by improving the shape of the vessels with implementation of modern hull forms. Hull forms optimization techniques could also be used for this purpose. Other techniques are needed to deal with the viscous portion of the total resistance, which is mainly...

Improving Server Application Performance via Pure TCP ACK Receive Optimization

Network stack performance is critical to server scalability and user-perceived application experience. Perpacket overhead is a major bottleneck in scaling network I/O. While much effort is expended on reducing perpacket overhead for data-carrying packets, small control packets such as pure TCP ACKs have received relatively scarce attention. In this paper, we show that ACK receive processing can...

Simulation-Based Optimization for Improving Hospital Performance

Background and Objectives: Nowadays health services affect a significant part of social, economic and political parts of each country. In this case, hospitals are considered as the important and final stage of health service supply chain. Consequently, quality of health services offered by hospitals has a straight impact on the safety of individuals. Methods: </st...