Fluid flow regime transition in water lubricated spiral grooved face seals

Spiral grooves are used to enhance the generation of a fluid film between sliding surfaces mechanical face seal when fluids with poor lubrication properties be sealed. This technical solution allows reducing asperity contact, wear, and friction during operation, due full surfaces. However because thickness film, flow regime can turn from laminar turbulent. transition significantly affect performance needs evaluated. Simulations have been performed water lubricated spiral grooves. The numerical model solves Reynolds equation energy in film. thermo-mechanical fluid–solid coupling is considered. theoretical predictions temperature compared experimental findings obtained on dedicated test rig seals different groove depths. comparison identify critical numbers corresponding regime.