Flow Through a Pipe: Modelica Model with Unequal Inlet-Outlet Areas

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To model a pipe in Modelica with unequal inlet and outlet areas, it's essential to understand that the mass flow rate remains constant, leading to increased fluid velocity at the outlet. A detailed mathematical expression can be derived using Bernoulli's principle, incorporating loss terms for friction and viscosity. This approach provides a comprehensive understanding of fluid dynamics in such scenarios. For additional assistance, consulting specialized forums or resources focused on fluid dynamics may be beneficial. Proper modeling will ensure accurate simulations of the flow behavior in the pipe system.
polezero
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Hello guys,

I need to model a pipe in modelica. Now modelica has its own fluid library where i can find a model of a pipe. But i need to model a pipe which has unequal inlet and outlet area. The outlet of the pipe is smaller than the inlet. Since mass going in the pipe=mass going out, hence the velocity of the fluid at the outlet should increase. I need a detail mathematical expression of this behavior. Please help me out.
 
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Bernoulli with loss terms included for frictional/viscous effects? Seems pretty cut and dry.
 
you can ask for a help in http://waterdesign.tk/ you ask them about pipes. they can help you
 
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