difficulty in modifying thermal liquid setting for air , water and oil

Hi @Oreoluwa,

I saw your comment regarding the difficulty in modifying thermal liquid settings to have air, water, or oil with a particular specific heat capacity (cp) flowing from a reservoir.

To achieve this, I recommend using a Variant Subsystem in Simulink (if that is what you probably using), which allows you to switch between different fluid property blocks dynamically without rebuilding your model each time.

Here’s a brief outline of the approach:

1. Create a Variant Subsystem containing three subsystems, each representing one fluid (Air, Water, Oil).

Refer to the official MATLAB documentation here: [ https://www.mathworks.com/help/simulink/ug/variant-subsystems.html ]

2. Set the thermal liquid properties in each subsystem’s Thermal Liquid Properties block (e.g., cp, density, viscosity, thermal conductivity) according to the fluid. You can find the Thermal Liquid blocks under Simscape > Foundation Library > Thermal Liquid.

Documentation link:[ https://www.mathworks.com/help/simscape/thermal-liquid.html]

3. Control which fluid is active by defining a variant control variable, such as `FLUID_TYPE`, in the MATLAB workspace:

   * `FLUID_TYPE = 1` for Air
   * `FLUID_TYPE = 2` for Water
   * `FLUID_TYPE = 3` for Oil

More on variant control: [ https://www.mathworks.com/help/simulink/ug/using-variants.html ]

4. Connect the output of this Variant Subsystem to your Thermal Liquid Reservoir or the rest of your fluid network.

5. Run the simulation after setting `FLUID_TYPE` to simulate the desired fluid properties.

This method offers flexibility and makes it easy to switch between fluids with their respective properties without modifying the model architecture.

Please let me know if you would find that helpful or if you have any further questions.