Volume-of-fluid (VOF) CFD simulations are carried out to provide a full description of the lamella characteristics of a Newtonian laminar jet spreading over a smooth moving substrate.
The jet Reynolds number and Weber number of the simulations are respectively in the range of 100-2000 and 200-6000. The jet-to-substrate velocity ratio is in the range of 0.1-2.5. The numerical results are validated with data measured on a custom-fabricated spinning disk experimental apparatus.
For various combinations of liquid properties, nozzle diameters, and jet-substrate velocities, the lamella dimensions (radius, width and thickness) obtained by simulations agree well with experimental measurements.
It is found that at a constant jet diameter and a substrate speed, the lamella thickness scales with the square root of the liquid kinematic viscosity.
Numerical Simulation of a Liquid Jet Impinging on a Moving SubstrateDownload Now 652.24 KB