Ansys Fluent Day 3, Heat Transfer

Heat Transfer:

  • Conduction: Solid-Solid Heat Transfer
  • Convection: Solid-Fluid Heat Transfer
  • Radiation: Heat Transfer via Electromagnetic Waves

CAD Preparation:

  • Remove Small, Low Power, Surface Mount Parts
  • Remove Interferences with the PCB
  • Remove Small Components Details
  • Remove Small PCB Holes
  • Focus on the Primary Conduction Path and the Convection Surfaces

Prepare in SpaceClaim:

  • Download the power_board_box.x_t file and open it in SpaceClaim
  • Flatten the assembly, extract the air, and Suppress the PCB Assembly
  • Create Named Selections
    • Circular Inlet
    • Rectangular Outlet
    • Transformer Coil Surface

Mesh in Fluent:

  • Leave everything at default

Setup in Fluent:

  • Turn on Energy!
  • Turbulence: K-Epsilon
  • Transformer Wall = 100 W/m^2
  • Inlet = 0.12 m/s @ 295.15K

Review:

  • The transformer must stay below 160 C. Does it?
  • Is this a good design? Why or why not?
  • Update the design by adding a single sheet metal baffle, in an attempt to remove more heat from the enclosure.
  • Additionally, investigate advanced ways to model fans.

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