Rough Surface Heat Transfer Ansys Fluent Simulation

Rough Surface Heat Transfer CFD Simulation with ANSYS Fluent

Project Description

Using ANSYS Fluent, investigate the heat transport mechanism on a rough surface with serrated fringes.  Using a laminar model to solve fluid flow equations, this work looks at how surface roughness influences heat transfer efficiency in low Reynolds number conditions; the energy model is used for temperature distribution computations.

Geometry and Meshing

• Design and Mesh: ANSYS Design Modeller builds the geometry; ANSYS Meshing software meshes it.  For thorough investigation, the structured mesh has 102,694 components.

CFD Simulation Settings

• Key Assumptions:

  • Results free of time define steady-state simulation.
  • Gravity influence in the Y direction is -9.81 m/s².

• Models and Boundary Conditions:

  • Viscous Model: Laminar
  • Energy Model: Activated
  • Inlet: Velocity of 0.0134 m/s at 300 K
  • Outlet: Pressure outlet with 0 Pa gauge pressure
  • Walls: Stationary, with a heat flux of 1000 W/m²

• Solution Methods:

  • Pressure-Velocity Coupling: SIMPLE
  • Spatial Discretization: Second order for energy, momentum, and pressure
  • Initialization: Standard approach at 300 K temperature and a speed of (0.0134, 0, 0) m/s

Results and Discussion

• Temperature Contours: 

  Indicate a rise in fluid temperature after passing the serrated fringes on the lower wall, changing the flow regime from laminar to turbulent and improving total heat transfer.

• Velocity and Streamline Analysis:Show vortex creation after fringes to show the shift to turbulence, which raises the heat transfer coefficient over that of laminar flow.

By use of this simulation, one may see how surface roughness affects heat transmission and fluid movement, hence providing ideas for design optimisation to improve thermal performance.