Abstract
The article presents a study of the tube form influence on performance of the peristaltic pump with the linearly placed tube and several pushers squeezing it in the transverse direction. The coupled numerical simulation of fluid flow and solid domain deformation was carried out using the software, based on the finite volume method. The cross sections with surface protrusions of two different types are considered for numerical simulation. The simulation results have shown that protrusions without a smooth transition at the tube walls reduce the compression ratio of the tube and therefore yield the flow rate reduce. Protrusions with s smooth transition at the tube walls on the contrary increase the flow rate in a high pressure range. Higher flow rate and pressure values achieved in the case of surface protrusions placed in the first compression region of the tube only. Comparison of pump characteristic curves shows that the use of tube surface protrusions can significantly increase the energy efficiency of the pump.
Highlights
The peristaltic pump is the pump which operates on the basis of the positive-displacement principle
The cross sections with surface protrusions of two different types are considered for numerical simulation
The flow rate is significantly higher if the protrusions are placed only in the first compression region but still lower compared to the tube without protrusions due to lesser compression ratio of the tube
Summary
The peristaltic pump is the pump which operates on the basis of the positive-displacement principle. It consists of an elastic operating element and several (or only one) squeezing elements. The fluid pumping occurs due to squeezing elements moving. The fluid displacing takes place when the elastic operating element is squeezed. On the other hand the fluid suction takes place when the elastic operating element returning to its initial form. A hose, a tube or membranes [1] can be used as the elastic operating elements in the peristaltic pump constructions. Rollers, sliding shoes, pushers, piezoelectric crystals can be used as the squeezing elements
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