Fluid Mechanics 2

What is the Eulerian frame of reference?

Everything is related back to a fixed point of reference

What is the Lagrangian frame of reference?

The frame of reference moves with a fluid particle.

what does the material derivative find?

Lagrangian rate of change

Incompressible flow definition

Density of a particle is constant

what must you assume for the continuity equation to be true?

continuum

what happens to body and surface forces when a fluid is static and there are no external body forces?

body force+surface force=0

how can three Euler equations be found?

x and y components, continuity equations

Bridgmann theorem

Physical dimensions can be expressed as the product of fundamental dimensions raised to the power of a real number

what is the number of dimensionless groups?

n-r

what assumptions are used to measure the speed of sound?

c is constant, 1D, inviscid flow, no body forces, compression is infintesimally small

what is a chocked nozzle?

When the flow through the nozzle occurs at a Mach number of 1

when is the mass flowrate maximum inside a nozzle?

when the nozzle is choked

Bernoulli equation assumptions

steady flow, inviscid, incompressible, same streamline

isentropic flow assumptions

continuum, steady flow, no body forces, inviscid, perfect gas, isentropic

Euler assumptions

inviscid, continuum