Viscous flows are governed by the Navier-Stokes equations which must satisfy the stricter boundary condition that flow is stationary both normal and tangential to a solid surface.
22.
The Orr Sommerfeld equation introduced later, for the study of stability of parallel viscous flow reduces to Rayleigh's equation when the viscosity is zero.
23.
The applied isostatic pressure provides additional driving force for densification by substantially increasing the atomic diffusion coefficients, which promotes additional viscous flow at or near grain boundaries and intergranular pores.
24.
Using the Oseen equation, Horace Lamb was able to derive improved expressions for the viscous flow around a sphere in 1911, improving on Stokes law towards somewhat higher Reynolds numbers.
25.
The discrepancy between the work of Newton, Mariotte, and Huygens, and Galileo's earlier work was not resolved until advances in viscous flow theory in the 20th century.
26.
The no-slip condition poses a problem in viscous flow theory at angle the contact line makes with the solid boundary, but the mechanism behind this is not yet fully understood.
27.
His technique combined the movement of his body, over which he had control, the viscous flow of paint, the force of gravity, and the absorption of paint into the canvas.
28.
Computational Fluid Dynamics ( CFD ) has contributed to substantial improvements in the performance and efficiency of Gas Turbine engine components through enhanced understanding of the complex viscous flow and heat transfer phenomena involved.
29.
A formal mathematical proof is lacking, and difficult to provide, as in so many other fluid-flow problems involving the Navier Stokes equations ( which are used to describe viscous flow ).
30.
A "'rheid "'is a non-molten solid that deforms by viscous flow at least a thousand times faster than it would deform elastically under the same applied stress.
