CFD simulation of a viscous coupling

Simulation results and validation measurements of a viscous coupling are presented. The analyzed Visco® clutch of MAHLE Behr is used to control the speed of the cooling fan of heavy duty trucks. It consists of a driven primary disc and a secondary housing with an engine cooling fan mounted on it. Highly viscous oil is pumped into small channels between these parts. Therefore, the fan speed depends on the amount of oil and its distribution within the clutch.

Numerical investigation of a non-Newtonian pump

In this work a reverse engineering (RE) procedure and a comparative CFD analysis using different software are presented. The three-dimensional flow in the semi-open impeller and volute of a centrifugal pump has been numerically simulated. This kind of impeller is less likely to clog with solid bodies (this is an important aspect in the case of slurry-processing) and for this reason is suitable for food, chemical and Oil & Gas industries. It is well known that the performance of a centrifugal pump drops when handling viscous fluids.