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Why do you think surface tension is important? It usually is not significant for large length scales. If you want to make surface tension a function of temperature then obviously you need to model the energy equation. This will add significant complexity and instability to the model, only do this if its contribution is significant. I recommend you start with constant surface tension (and isothermal) before tackling the more difficult varying temperature/surface tension simulation. The reference in the documentation describes how the compressive discretisation scheme find the free surface. Also I think there a description of the surface tension approach in the documentation. |
hi are you sure that i need the energy equation? it is q=n*delta(h)?
i have a laminar flow so i think it is RE as non-dimension number. how did the solver know that i actually declared the surface tension by the expressions? the surface tension-curve as function of the temperature is that what i have to implement!so itīs very important to me to know how the surface tension is changing during the flow. i have first of all a water film on a platt . this platt has 2 different temperatures(2 bottoms),my flow is laminar. later i will modelling a polymersolution! |
You don't know what the energy equation is, you don't know what the Re number is.... Sounds like you need to learn some basic fluid mechanics. I would forget about modelling surface tension and polymerisation until you know the basics.
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different result
dear all,, what do you think,,
i ran free surface flow on ship at 7 knot and 9 knot,, and the result of force x on ship on 7 knot in negative but on 9 knot is positive.. which is true..?? please answer,, and thanks before.. |
Probably neither.
Please do not hijack threads. Start a new thread for a new question. |
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