Surface Wettability Effect on Pool Boiling, Validation

$540.00 Student Discount

  • The problem numerically simulates Pool Boiling using ANSYS Fluent software.
  • We design the 3-D model with the Design Modeler software.
  • We Mesh the model with ANSYS Meshing software.
  • The mesh type is Structured, and the element number equals 60000.
  • This project is simulated and validated with a reference article.
  • We perform this simulation as unsteady (Transient).
  • We use the VOF Multi-phase model to define the two-phase flow.
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Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
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Surface Wettability Effect on Pool Boiling Curve, Paper Numerical Validation, CFD Simulation by ANSYS Fluent

The present problem simulates the nucleate boiling inside a vertical channel by ANSYS Fluent software. The simulation is based on a reference paper, “A numerical investigation of the effect of surface wettability on the boiling curve,” Its results are compared and validated with the results in the article. Surface Wettability Effect on Pool Boiling Curve is studied and analyzed.

The water inside the channel is assumed to have a saturated temperature of 373K. The channel has a heat plate (bottom wall) with different temperatures (from 375-475K) to account for differences based on the paper.

Inside the channel, the water has a temperature of 100 degrees centigrade, so the boiling process will start when it comes into contact with the hot bottom wall. If it is big enough, the boiling nucleate will occur, and a hot bubble will separate from the heated surface.

The geometry of this model is designed in ANSYS Design Modeler and is meshed in ANSYS meshing. The mesh type used for this geometry is structured. The total element number is 60000.

Pool Boiling Methodology

It should be mentioned that to simulate two phases of air and vapor, the VOF Multiphase model was activated. The present simulation and its results are transient.

Pool Boiling Conclusion

At the end of this simulation, the results of the present work are compared and validated with the results obtained by the article. For this purpose, the diagram in figure 8 shows the changes in transferred heat flux to fluid based on the changes.

The current project is for the state of contact angle equal to 60 degrees.

Paper Results Present Simulation Error (%)
Average 55741.9 52158.295 6.429
Max 67096.8 64285.516 4.189


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