the relationship between mass flow rate and volume flow rate?

Answer 1

Mass flow rate is the amount of mass passing a point in a given time. Volume is the amount of volume passing. Density is equal to mass divided by volume so volume flow rate times density is equal to mass flow rate.

Answer 2

Mass Flow Vs Volumetric Flow

Answer 3

In oil wells or pipelines, two-phase flow (vapour + liquid) and even three-phase flow (gas + water + oil) are known where the phases all flow at different velocities. For a simple example, in a horizontal section of a pipeline, there may be moving vapour over a relatively stagnant layer of liquid, but in every case where the flow is not fast enough to be fully turbulent, there will be some phase slippage.

For each phase, the ratio of the volumetric flow rate to the mass flow rate is the density of that phase. However, the ratio of the total volumetric flow rate to the total mass flow rate gives an "average mixture density" which is skewed in favour of the faster-moving phase or phases.

Answer 4

Mass flow rate is the movement of mass per time. Its unit is mass divided by time - kilogram per second in SI units, and slug per second or pound per second in US customary units.

Mass flow rate can be calculated from the density of the liquid (or gas), its velocity, and the cross sectional area of flow.

M= ρ*V*A , where:

M= mass flow rate
ρ = density at a working temperature.
V = velocity
A = flow area
The mass flow rate can also be calculated by multiplying the volume flow rate by the density.

M= ρ * Q
where:

ρ = density at a working temperature.
Q = volume flow rate

Answer 5

Water pressure at the bottom of a swimming pool is greater than at the surface because of the weight of water above the bottom of the pool. This also produces a force on the bottom of the pool. A larger volume of water in a vertical tank (deeper water) means greater pressure and force near the bottom to force water flow out a pipe, etc. Greater volume in a horizontal tank (longer tank?) will not increase the pressure and force per square inch at the bottom and will not increase flow rate (only time to drain the tank).

Answer 6

volumetric flow rate is the volume of material flowing per unit time, mass flow is amount of mass per unit time. To relate them, you need to know some properties of the fluid, like temp, pressure, etc. to find density. once you know the density and volume flow rate, multiply and you have mass flow rate. If you have mass flow rate, divide by density to get volumetric flow rate. make sure units cancel out and are compatible.

Answer 7

If you are talking engines, you are actually concerned about mass flow rate, because you are concerned with the mass of fuel you may burn per unit time, and this is governed by your mass of oxygen.