What is the complete derivation of the nonhomogeneous fluid flow rate equation?

In summary, the complete derivation of the nonhomogeneous fluid flow rate equation involves analyzing the governing equations of fluid dynamics, specifically the continuity equation and the Navier-Stokes equations. The process starts by considering the fluid's density variations and applying the conservation of mass and momentum principles. This leads to the formulation of the flow rate as a function of pressure gradient, viscosity, and density variations, ultimately resulting in an equation that incorporates these factors to describe the flow rate of nonhomogeneous fluids in various contexts, such as porous media or complex geometries.
  • #1
fahadismath
2
0
does anyone know the derivation of the general solution of the nonhomogeneous equation shown in the image (book name: Devendra K. Chaturvedi - Modeling and Simulation of Systems Using MATLAB and Simulink -CRC Press (2010))
Capture.PNG
 
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  • #2
This is basic calculus.
[tex]\begin{split}
\frac{dC}{dt} &= \frac{F}{V}(C_0 - C) \\
\int \frac{1}{C_0 - C}\frac{dC}{dt} \,dt &= \int \frac{F}{V}\,dt \\
\int \frac1{C-C_0}\,dC &= \ln |k| - \frac{F}{V}t \\
\ln |C - C_0| &= \\
C(t) &= C_0 + ke^{-Ft/V}.\end{split}[/tex] (We can drop the absolute value signs since [itex]C - C_0[/itex] and [itex]k[/itex] must have the same sign.)
 
  • #3
in your derivation you didn't complete this step ln|C-Co|= ? KINDLY write the complete equation
 
  • #4
fahadismath said:
in your derivation you didn't complete this step ln|C-Co|= ? KINDLY write the complete equation
It equals the same as the right side of the line above it: ##\ln |k| - \frac{F}{V}t##.
 
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