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Fluid flow which is not subjected to direct influence of the fluid viscosity.It may happen for low- viscosity fluids or for the very high Reynolds numbers(except for the indirect influence of contact forces, see below).
In this case case Navier-Stokes fluid flow momentum equation simplifies simplifies to Eauler fluid flow momentum equation.
This flow regime happens for high Reynolds numbers
, which originates from: LaTeX Math Inline body {\rm Re} \gg 1
low-viscosity fluids | high velocities
| large distance to solid boundaries restricting the flow
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The Reynolds numbers should not necessarily to be very high to induce an inviscid flow and many a laminar flows
LaTeX Math Inline | ||
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This makes Eauler fluid flow momentum equation a very popular modelling tool in Fluid Dynamics.
In many practical applications the fluid viscosity can not be neglected even for the low-viscosity fluids.
This happens for example, when fluid flow is restricted by happening close to solid boundaries which interaction (a friction) with the fluid depends substantially on fluid viscosity.
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Physics / Mechanics / Continuum mechanics / Fluid Mechanics / Fluid Dynamics / Fluid flow
[ Navier-Stokes fluid flow momentum equation ] [ Eauler fluid flow momentum equation ]