Objectives_template

Mass conservation equation
Principle of mass conservation

	------ (1)
Rate of accumulation in fluid element =	------ (2)
Rate of mass in fluid element across face A =	------ (3)
Rate of mass leaving fluid element across face B =	------ (4)
The net efflux in x-direction =	------ (5)
The net efflux in y-direction =	------ (6)