Hello
Resarcharch scholars/Professor/Cfd Enthusiast/Engineers/Students I am trying to simulate the micro heat pipe in fluent, basically it is a heat pipe with condensation occurring at one end evaporation at other end and capillary forces due to change in curvature of vapour-liquid interface moves the fluid at corners from condenser section to evaporator and vapour move in central region
I have taken a 1000 micrometer pipe with 300mm of both evaporation and condenser section from both end and leaving 400 in between as adiabatic section
Problem I am facing while simulation is that the liquid is evaporating in evaporation section but not condensing in condenser section i am using the VOF model
I am new into all this any type of help is deeply appreciated, if any one can share the fluent case of evaporation/condensation process it will be of great help.
Regards
Hi Akashdeep,
As shown in contour plot, i believe (if i am not wrong) the flow inside micro-channel is not fully developed. VOF model has limitation as you can not use it for streamwise periodic flow.
I have two suggestions:
1. Please increase the pipe dimension in m or at least in mm and run the simulation, it should work. If it works meaning, there is issue with flow in micro-channel. If it does not, please go for Eularian (condensation-evaporation model )
2. For micro-channel, At first you only check flow in solution control and later you check other parameter once your flow is stabilized.
Good luck
Thanks for your prompt reply and suggestions basically I am unable to increase the pipe length as I have to take care of a maximum number of cell
As you told that the VOF model cant be used for periodic flow i want to read more abt this pleas suggest some references
And i didn't understand your 2nd suggestion can you please elaborate
Once again thanks for your suggestion
https://www.sciencedirect.com/search?qs=Simulation%20Of%20Micro%20Heat%20Pipe&show=25&sortBy=relevance
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