The objective of this study is to fully characterize the flow within the HeartQuest ventricular assist device (VAD), a magnetically levitated centrifugal VAD, using particle image velocimetry (PIV) to identify regions of potential high shear or stagnation and validate and refine computational models of the flow. An acrylic model of the pump was designed and constructed to allow optical access i...

Plume containment using pump-and-treat (PAT) technology continues to be a popular remediation technique for sites with extensive groundwater contamination. As such, optimization of PAT systems, where cost is minimized subject to various remediation constraints, is the focus of an important and growing body of research. While previous pump-and-treat optimization (PATO) studies have used discreti...

One of the most important components in hydraulic circuits is the pump that generates hydraulic supply at constant pressure. The performance and the versatility of a variable displacement piston pump are, to a large extent, determined by its controller. Upgrading of existing controllers is considered one of the major means of improving the characteristics of the pump. The dynamic performance of...

In district heating stations, the heat carrier is circulated between the energy source and consumers by a pumping system. Fluid handling systems, such as pumping systems, are responsible for a significant portion of the total electrical energy use. Significant opportunities exist to reduce pumping energy through smart design, retrofitting, and operating practices. Most existing systems requirin...

In modern coronary bypass surgery, new objectives have been set based upon a minimal invasive approach: beating heart surgery is the new trend to follow, although this might not be feasible in more complex cases. In these cases, the beating heart could be supported by a mechanical device, preferably a device with minimal invasive features to fit in this new approach. For this purpose, two intra...

This article presents the design of a two-dimensional (2D) piston pump flow-distribution port with an overlapped structure that reduces backflow in chamber and pressure ripples at outlet, thus minimizing vibration noise caused by high-frequency distribution process single pump. We describe flow operation principle 2D pump, create mathematical model using motion continuity equations piston, use ...

The impeller blades will continually strike the slurry mixture inside pump, causing deterioration and a change in particle size. In this study, degradation of mineral particles under various cycle times, rotational speeds, flow rates is analyzed. microscopic parameters polymetallic nodules are calibrated by EDEM, transport deep-sea lifting electric pump simulated based on coupled CFD-DEM soluti...

An oblique flow pump is widely used in farmland irrigation and drainage, water transfer projects, thermal power generation, other fields. However, unstable factors the easily lead to vibration noise. To improve stability of operation optimize operating environment, it necessary study flow-induced noise characteristics pumps. In this paper, CFD simulation software are calculate field sound pump....