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@@rahulmelkani6966 let try with an analogy. let's say a train arrives at a platform there 20 people entering the train per sec at that platform and there are 10 people leaving from the train per sec on the same platform. than tell me what is the rate of increase in number of people in the train. i don't know wether i explained it well enough. but mujee to aisa he samja.
Best way to explain sir💓💓 Huge love from Pakistan. Can you kindly make a video for law of conservation of momentum (navier stoke equation derivation complete? Computational fluid dynamics book
Still don't understand why you need to add the Mass coming into the element @ABCD to the rate of change of mass in the x-direction in the element to get the mass exiting the element at EFGH, anyone?
We have to add rate of change in mass with mass entering the face ABCD. It's because the here we use integration to find the rate of change in mass which gives exact value of change in mass it may be positive or negative. So by adding the rate of change in mass with the mass entering through the face ABCD we will get the mass of fluid leaving through the face EFGH. He take 2kg-1kg just as an example.
