Tas, Femke F.N. (2023) A Study on the Ball Check Valve. Bachelor's Thesis, Chemical Engineering.
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Abstract
In this thesis the behaviour of a ball check valve is studied with use of Comsol Multiphysics, a CFD software. Multiple input parameters were varied to examine the effects on the behaviour of the valve. First the maximum in- and outlet pressure was enlarged which resulted in an earlier opening of the valve and a rise in viscous drag. The spring constant proved to have a proportional relation to the pressure whereat the valve opens. When the drag coefficient was calculated for these situations, it turned out that the values could not be compared with the literature value of the drag coefficient of a sphere. Hereafter the fluid type was altered from a Newtonian liquid to a non-Newtonian liquid and a gas. The inelastic models of the non-Newtonian liquid proved no substantial differences. Gas exerted a smaller viscous force on the sphere but reached a higher velocity than the liquid due to its lower viscosity and compressibility. The sphere was redesigned to a more aerodynamic droplet shape to study whether the drag force would decrease. However, not a significant reduce in drag was obtained as the shape was not completely streamlined. Finally, the closure of the valve was examined. There proved to be no back flow of the fluid during the closing, thus the fluid did not get contaminated.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Druetta, P.D. and Raffa, P. |
| Degree programme: | Chemical Engineering |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 10 Jul 2023 13:37 |
| Last Modified: | 10 Jul 2023 13:37 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/30472 |
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