I am trying simulation on natural circulation loop. when i am validating paper, all flow properties like mass flow rate, density and radial velocity is exactly matching with article. but when comes to thermal properties like local heat transfer coefficient and local heat flux, Grashoff number are not matching. what parameter i can change so that thermal properties match with research article.
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Hello Saravanakumar Tamilarasan ,
Such parameters are highly sensitive to the grid near the walls of the domain. So you should make sure that the grid in those regions is fine enough or consistent with the turbulence model you are using.
The question would be clearer if the formulations of the reference work and your comparison were included in this text. Nevertheless, you can verify a few things: (1) The heat transfer coefficients or Nusselt number can be described in several ways, depending on the thermal boundary condition. It is advisable for you to review and assess your formulation. (2) Verify if the thermal properties, namely the thermal conductivity, are identical to those reported in your reference studies. (3) If the deviations are not significantly greater, then examine the grid size in the vicinity of the boundaries where the temperature gradient needs to be computed.
thank u sir, the first point which u mentioned helpful for solve my problem , thanks a lot sir@Surendra Singh Rathore
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