Improvement of a vertical falling ball viscometer for measuring engine oil properties using 532nm diode laser, with estimation of the concentration of operated oil

الملخص EN

-In this work, an improvement of falling ball viscometer was presented using laser beam.

Several parameters such as viscosity, shear stress, shear rate, Reynolds number and drag coefficient were calculated for a sample of unused engine oil.

In the other words, during the operation of engine, the variation of viscosity occurs due to the increasing in the engine temperature and may in the increasing of the concentration of engine body particles inside the oil due to friction force even with existing the oil filter there are tiny particles that pass through the oil filter, therefore a Lambert’s law was used to estimate the particles concentrations of the operated oil, the resulted graphs show increasing of the impurities concentration with operation time.