Performance Study of a Journal Bearing with Structured Artificial Roughness using CFD as a Tool

Performance of a Journal bearing depends on two aspects. First one is the improvement of inherent properties of lubricant by rigorous research. Second one is the improvement of bearing performance by doing some research on the design aspects of bearing surface. Improvement of bearing performance does mean that its load carrying capacity will be increased and at the same time the frictional loss due to the shearing phenomenon between bearing surface and the lubricant layer should be decreased. It has been proved that if artificial roughness can be created on the bearing surface perfectly it can increase the performance of a journal bearing. Now it is the matter of research that which shape, dimensions, position and orientation will increase the performance of a given journal bearing most.In the present work an attempt has been made to study the influence of a specific type of artificial roughness on the performance of a journal bearing.