simulating two phase heat and mass transfer inside two phase closed thermosyphon.
I'm simulating two phase heat and mass transfer inside two phase closed thermosyphon using VOF model in 2-D axysymmetric rectangular geometry.I've further splitted the geometry into three parts using ANSYS SPACE CLAIM. Can someone help me with the next steps to follow?
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what type of help do you need?
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vivek162,i'm simulating a paper https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&u act=8&ved=2ahUKEwix8fezv8neAhVVknAKHZS7AXIQFjAAegQ ICBAC&url=https%3A%2F%2Fwww.researchgate.net%2Fpro file%2FAbdelhamid_Kassem%2Fpost%2FHow_do_I_simulat e_condenser_section_heat_pipe%2Fattachment%2F59d64 0bb79197b807799ce1e%2FAS%253A431955293544449%25401 479997575885%2Fdownload%2FNumerical%2Bmodelling%2B of%2Bthe%2Btemperature%2Bdistribution%2Bin%2Ba%2Bt wo-phase%2528Autosaved%2529.pdf&usg=AOvVaw3u0rPdu3PQu wkaJIqX9E1O using ANSYS 19.0 student version.In the paper ,saturation temperature is 373 k inside the thermosyphon,but there is no mention of saturation presssure.What is the pressure inside the pipe,also can i take steady state instead of tansient.In that case,what will be the impact?
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I have simulated the same model. "The VOF formulation in ANSYS Fluent is generally used to compute a time-dependent solution". it is better to go with a transient.
Particularly for the same paper, they have used operating pressure 101325 Pa. if you want to change the operating you have to look for the respective saturation temperature of water ( It will be lower than the 373 K depends on operating pressure). if I am not wrong then you have asked the same question on Ansys student community I have mentioned there about the standard state enthalpy if you will take the wrong value, you will phase the problem of Global courant no. error ( same for the time-step you have to chose the correct time-step). Try that if you will face any problem let me know. Moreover, if you have set a saturation temperature of 373 K. then initialize your case at 373.1 K slightly higher than the saturation temperature to save the computational time. |
sir,can you give me your mail address so that i can discuss with you the steps,i am following.
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how far result will be affected when using implicit scheme instead of explicit scheme in simulation of two phase closed thermosyphon?
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This link might help you to understand the difference between implicit and explicit scheme
https://www.flow3d.com/resources/cfd...rical-methods/ |
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