Other than changing the observer's position and adding a viscous medium, nothing else is modified in this movement.
In the viscous-convective range the viscosity plays a dominant role but the diffusion can be neglected.
At stage 8, the endosperm changed from a liquid to viscous consistency and occupied only 50% of the seed volume.
As the flow decays under viscous influences, fluid particles have less kinetic energy to exchange for potential energy in their vertical motions.
The order of the parameters motivates us to consider inviscid flow with heat convection and conduction, neglecting viscous boundary layers, surface tension and gravity.
A theoretical model for the spreading of viscous gravity currents over a rigid horizontal surface is derived, based on a lubrication theory approximation.
Upon returning to the stationary frame of reference, these cells are precisely the viscous vortices oscillating to and fro high above the ripples.
This is in striking contrast to the familiar downstream growing boundary layer and downstream viscous wake existing when the fluid is homogeneous.
