In de-icing (defrost) simulation, need to make ice layer to "laminar zone" in v6.0.x
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In defrost simulation, the solidus temperature (Ts) and the liquidus temperature (Tl) is set to very low values in the air region to avoid air to solidify - a common practice. In V5.x, the following properties were recommended in air to avoid solidification: Melting Heat: 1 j/kg Ts=2K Tl=1K But if the above settings are used in v6.0.x for air, the ice-layer does not melt! Significant enhancements are made to solidification/melting model in v6.0.x. The workaround in v6.0.x is to use the following properties for air: Melting Heat=1 j/kg, Ts=1K Tl=2K The above setting will allow melting. ALSO, you need to impose "Laminar Zone" in the ice-layer. Without this, the defrost pattern will be delayed significantly in v6.0.x! The new recommended air settings in v6.x was tested on the de-icing tutorial. The results matched with that obtained using v5.x using the old settings. Note that in v6.1, it will not be necessary to follow the above settings - the default values for air properties should be fine. |
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