Picture of blood cells

Open Access research which pushes advances in bionanotechnology

Strathprints makes available scholarly Open Access content by researchers in the Strathclyde Institute of Pharmacy & Biomedical Sciences (SIPBS) , based within the Faculty of Science.

SIPBS is a major research centre in Scotland focusing on 'new medicines', 'better medicines' and 'better use of medicines'. This includes the exploration of nanoparticles and nanomedicines within the wider research agenda of bionanotechnology, in which the tools of nanotechnology are applied to solve biological problems. At SIPBS multidisciplinary approaches are also pursued to improve bioscience understanding of novel therapeutic targets with the aim of developing therapeutic interventions and the investigation, development and manufacture of drug substances and products.

Explore the Open Access research of SIPBS. Or explore all of Strathclyde's Open Access research...

A CFD and experimental study on cavitation in positive displacement pump : benefits and drawbacks of the "full" cavitation model

Iannetti, Aldo and Stickland, Matthew and Dempster, William (2015) A CFD and experimental study on cavitation in positive displacement pump : benefits and drawbacks of the "full" cavitation model. Engineering Applications of Computational Fluid Mechanics, 10 (1). pp. 57-71. ISSN 1994-2060

Text (Iannetti_etal_EACFM_2015_a_CFD_and_experimental_study_cavitation_positive_displacement_pump_benefits)
Accepted Author Manuscript
License: Creative Commons Attribution 4.0 logo

Download (1MB)| Preview
    Text (Iannetti-etal-EngAppsComputFluidMechs-2015-A-CFD-and-experimental-study-cavitation-positive-displacement-pump-benefits-and-drawbacks-full-cavitation-model)
    Final Published Version
    License: Creative Commons Attribution-NoDerivatives 4.0 logo

    Download (2MB)| Preview


      To fill the lack of literature in the numerical study of Positive Displacement (PD) pumps in cavitating condition, a comprehensive and transient Computational Fluid Dynamics (CFD) model of a PD pump, simulating the cavitation arising during the suction stroke, was created. The “full” cavitation model was utilised to study its capability on PD pumps cavitation. A set of three plunger speeds were simulated. Using the highest plunger speed an assessment was made of the effect of 1.5, 3, 4.5 and 15 ppm of air mass fraction on pump performance and cavitation. An experimental test rig, replicating the CFD model, was designed and built in order to validate the numerical model and find its weaknesses. CFD modelled, in a consistent way, the fluid dynamics phenomena related to cavitation (chamber pressure approaching the vapour pressure, the vaporization/condensation and the pressure spike occurrence at the end of the suction stroke marking the end of cavitation). On the other hand the CFD pressure trends calculated appeared stretched along the time axis with respect to the experimental data and this highlighted issues in the multiphase and cavitation models: the vaporization/condensation rate calculated by CFD did not follow the real dynamics correctly because the non-condensable gas expansion was overestimated. This was seen when comparing the CFD/experiments where the simulated pressure drop gradient, at the beginning of the suction stroke and the pressure peaks as the valve closed, exhibited a delay in their occurrence. The simulation results were sensitive to the dissolved air mass fraction as the delay depended on the amount of air dissolved in the water. Although the influence of the air mass fraction was considered consistent, the 3 ppm CFD case was the closest to the experiment results whereas the analyst expected the 15 ppm case to be more accurate.