MATLAB: How to know whether to use the 3-Zone Pipe (2P) or the 2-Zone Pipe (2P)

SimscapeSimscape Fluids

How do I know whether to use the 3-Zone Pipe (2P) or the 2-Zone Pipe (2P)?

Best Answer

The 3-Zone Pipe is part of Simscape Fluids, and the 2-Zone Pipe is part of the Simscape foundation library. The way to think about this is that the 3-Zone Pipe is a specialized component designed for a specific purpose, and the 2-Zone Pipe is designed for all other purposes.

The purpose of the 3-Zone Pipe can be summarized by the following sentence found in the Description section of the 3-Zone Pipe's documentation page:

"Use this block to efficiently capture, without resorting to chains of Pipe (2P) blocks, the dynamics of phase change along a pipe."

https://www.mathworks.com/help/releases/R2018b/physmod/hydro/ref/3zonepipe2p.html#d120e8940

Unless you need the specific features designed for capturing the dynamics of phase change along a pipe, you do not need the 3-Zone Pipe. For example, do you need to know the length fractions of the liquid, vapor, and mixed-phase zones in the pipe? This can be observed via the output port Z of the 3-Zone Pipe. In contrast, the 2-Zone Pipe does not offer this information.

https://www.mathworks.com/help/releases/R2018b/physmod/hydro/ref/3zonepipe2p.html#d120e9835

For more information, you can explore the following Simscape examples.

Example using the 2-Zone Pipe:

https://www.mathworks.com/help/releases/R2018b/physmod/simscape/examples/two-phase-fluid-refrigeration.html

Example using the 3-Zone Pipe:

https://www.mathworks.com/help/releases/R2018b/physmod/hydro/examples/pipe-fluid-vaporization-and-condensation.html

Related Solutions

MATLAB: Where can I find the source code of 3-Zone Pipe (2P)

Hi Takahiro

unfortunately most of the components in the Simscape Fluids library are not open. Only Simscape Foundation library is fully open, where you found the simple Pipe (2P).

Why are you looking for the source code? To understand better how it was implemented, or to modify it?

https://ch.mathworks.com/help/physmod/hydro/ref/3zonepipe2p.html

We try to provide all the equations/explanations in the documentation for the block. Pelase let us know if somethings were not clear enough.

MATLAB: Flow in the pipe

The inner for-loop overwrites va one hundred times. The outer for-loop draws the "same" image one hundred times in the same place.

In plain English, what do you want to show in the second plot?

&nbsp

Replace

    T=100*ones(100,R*2);
    ...
    % end of script

    % T=100*ones(100,R*2);
    subplot(2, 1, 2)
    plot( 0, r, 'r.' );
    axh = gca;
    set( axh, 'XLim', [0,1e3] )
    hold all
    for t = 1:6
        displacement = V*t;
        plot( axh, displacement, r, 'r.' );
        pause( 1 )
    end

and run the script. That will take you a bit closer to the goal.

Best Answer

Related Solutions

MATLAB: Where can I find the source code of 3-Zone Pipe (2P)

MATLAB: Flow in the pipe

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