**Mass flow rate**

The conservation of mass which states that “mass can neither be created nor be destroyed but it can be changed from one form to another and the amount of mass always remains the same” mass is the matter which exists in the body it is the inherent property of an object or in a broad manner mass is the something which a body has when it is occupying some space and it is another measure of this volume.

One of the amazing facts is that when it comes to liquid and gases, the mass can be redistributed and it keeps on moving in the entire body this is due to weak intermolecular forces and in solid, they have strong intermolecular forces which don’t allow redistribution of mass.

**The concept of mass flow rate**

Suppose we have a chamber which has a small length at the binging and as the length increase after some length the width of the camber starts increasing. Here one thing that we have to note is that there is no accumulation or destruction of mass through the tube which we have. Now we since this is a pipe we can conclude that the amount of mass incoming will be equal to the amount of mass outgoing since we have no mass which included inside of the chamber. Let’s us consider any perpendicular plane inside the chamber and this should be perpendicular to the centerline of the tube hence the amount of mass which is passing through this perpendicular plane is called as mass flow rate. and according to the principle of continuity, the mass flow rate through any tube is always a constant, that actually means the amount of the mass which is going inside the chamber is equal to amount of mass which coming outside due to this fact we can determine the amount of mass which is going inside which surely will be equal to amount of mass which is going outside.

In order to calculate, let as consider area A through the mass is passing at a velocity of V hence we can define a volume mass which is to be swept out in a given interval of time t therefore we have

**V=A*V*T** and according to this the volume of the mass which is swept in a particular period of time is equal to the A area in consideration, the velocity of the mass and the time taken in this process

here now if we have the volume of the swept mass then when we multiply the volume with its density then we can say that we will have the mass of the swept mass in that perilous interval of time here

**M=V*D,** where M is mass, v is the volume a D is the density.

the mass flow rate is actually known as the most, here we can divide the mass with time which will give as the mass per unit volume therefore

**Mdot= R*A*V**