Surface texturing, such as the introduction of micro dimples or other well-defined features on the surfaces of components like bearings or mechanical seals, can indeed influence the hydrodynamic behavior between those surfaces when they are in relative motion. This technique is often employed to enhance lubrication, reduce friction, and improve the overall performance and durability of machinery. Let's delve into how hydrodynamic pressure is built up between parallel surfaces using surface textures:

It's important to note that the effectiveness of surface texturing depends on various factors, including the texture geometry, operating conditions (such as speed, load, and lubricant viscosity), and the nature of the contacting surfaces. Numerical simulations and experimental studies are often used to fine-tune the texture design for optimal hydrodynamic performance.

Overall, surface texturing is a strategy to enhance the lubricating properties of interfaces in relative motion by leveraging hydrodynamic effects, thus improving efficiency, reducing wear, and extending the operational life of mechanical components.

Thank you, Kristaq Hazizi.

I recommend you read some papers on this topic.

The above comments and explanations are not obvious and not always true. For example, partially textured and full textured surface configurations lead to different performances in terms of load carrying capacity.

Some explanations are given in this two papers:

DOI 10.1243/13506501JET433 : “About the Validity of Reynolds Equation and Inertia Effects in Textured Sliders of Infinite Width.”

DOI 10.1243/13506501JET673 :  “Optimizing surface texture for hydrodynamic lubricated contact using a mass-conserving numerical approach.”

Simple explanations with an analytical modeling are presented in:

DOI 10.1243/13506501JET470  : “Analytical investigation of a partially textured parallel slider.”

Experiments on parallel surface thrust bearings are presented in :

DOI 10.1177/1350650114537484  : "An experimental analysis of the hydrodynamic contribution of textured thrust bearings during steady state operation - Comparison with the untextured parallel surface configuration."

DOI 10.1016/j.triboint.2017.12.021  :  "Experimental analysis of the hydrodynamic effect during start-up of fixed geometry thrust bearings.”