Fluids

Fluids

Helical Coil Heat Transfer

    • peteroznewman
      Subscriber

      I was interested in a model to evaluate the temperature change of water flowing through a tube immersed in a tank of water.  I modeled 5 turns of a helix with a radius of 30 mm, pitch of 23 mm, aluminum tube OD of 10 mm with a 1 mm wall thickness. I used Excel to create a file of points on the helix and imported that file into DesignModeler as a 3D curve.  A line body represents the water flowing in the tube. The flow rate is 1 kg/s and the input temperature is 100 C. A solid body represents the tube. A convection BC represents the outside of the tube losing heat to the outside water at a temperature of 25 C. A second convection BC represents the inside of the tube taking heat from the fluid inside the tube.


      2345


      After I solved this system, I plotted the temperature of the water in the tube.



      I was interested to learn that I could obtain results from the Steady State Thermal system block that I initially thought I would have to build a much more complicated CFD model to get similar results.


       

    • Raef.Kobeissi
      Subscriber
      A great example to share!
    • peteroznewman
      Subscriber

      Thanks Raef.


      The above model was in response to a student who asked how to create a mesh for a helical coil to do convective heat transfer. Upon further correspondence, I learned his project was to build skill in CFD by reproducing a model described in a research paper


      After I read that paper, I understood that rather than being given the convective heat transfer coefficient, which I needed in the above model as an input, the purpose was to build a CFD model to calculate the convective heat transfer coefficient as a result from the simulation. This was something that interested me also.


      Cheers,
      Peter


       

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