About the setting of valid phase in block
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For example, in a heat exchanger, the hot flow is all gas when it goes in, and the cold flow is liquid when it goes in. There are some solids in it, such as CaCL, and part of it is gas when it goes out. I saw that others have set the valid phase to vapro-liquid. Why not set it to vapro-liquid-solid? Is it because solids do not participate in heat exchange, or is it for some reason? Thank you
It depends on the specific situation. If there are solids in your system, just select them. There are two liquid phase options: VLL.
The mixed part of the solid should not be regarded as a "solid phase". If there is no solid phase, you cannot choose solid. Either there is a solid or a solid phase. The "gas, liquid, solid" here refers to the phase, not the gas, solid, or liquid.
Thank you so much. But I just don't know if he can be used as a phase. It means combustion produces gas, and there are some particles in the gas. I don’t know if those particles are treated as impurities./
Well, the choice of phase affects the choice of physical properties method. Some physical property methods can only be used for VL, not VLL. If you select the phase state of VLL, you can only select the corresponding physical property equation.