Abstract: With the development of manufacturing technology, rotating machinery becomes increasingly powerful with higher
and higher rotation speed. Fluid lubricated journal bearings are widely used in large rotating machinery because of its low
cost, long life, silent operation, and high radial precision and simple application. In this work journal bearings for L/D ratio
and different eccentricity ratios are modelled in 3D modelling software CATIA. The L/D ratio considered is 0.5 and
eccentricity ratios considered are 0.2, 0.4, 0.6 and 0.8. The liquid lubricants considered are SAE 20 oil, SAE 40 oil. Journal
bearing models are developed for speed of 2000 rpm to study the interaction between the fluid and elastic behaviour of the
bearing. The speed is the input for CFD analysis and the pressure obtained from the CFD analysis is taken as input for
structural analysis. Computational fluid dynamics (CFD) and fluid structure interaction (FSI) is done in Ansys.