Lecture Notes: Post-Processing in Ansys Fluent

Overview

• Results Tab: Used for post-processing SCFD simulation results.
  • Surface & Graphics Groups: For qualitative aspects.
  • Plots & Reports: For quantitative aspects.
• Focus: Plots and reports in this lesson.
• Learning Objectives: XY graphs, flux, force, surface integral, volume integral reports, generating detailed simulation reports.

Getting Started

• Steps to Follow:
  1. Launch Ansys Fluent in solution mode.
  2. Load a simulated case.
  3. Navigate to the Results tab.

Plots Group

• Function: Extract and plot numerical data from CFD simulation.
• Features: XY plots, histograms, data combination, residual control.
• Creating an XY Plot:
  1. Click XY Plot -> New.
  2. Configure in the Solution XY Plot dialog box.
  3. Use options to control node values, axis functions, file writing.
  4. Example Variable: Pressure (y-axis) vs. Direction Vector (x-axis).
  5. Create new surfaces if needed (e.g., line rake).
  6. Customize axes and curves if necessary.
  7. Save plot data.

Residuals Option

• Same as in the Reports Group of the Solution tab.

Data Sources

• Combine and plot data from multiple sources (XY plots, report plots, external data).

Reports Group

• Reports Types:
  • Flux Reports: Computes mass flow rate, heat transfer, etc.
    • Example: Compute mass flow rate at Inlet and Outlet.
  • Force Reports: Computes forces, moments, center of pressure.
    • Example: Compute pressure and viscous forces on walls.
  • Surface Integrals: Computes various integrals over surfaces.
    • Example: Compute mass weighted average temperature at Outlet.
  • Volume Integrals: Similar to surface integrals but for cell zones.
    • Example: Compute volume average velocity in fluid zone.

Simulation Reports

• Function: Generate customizable HTML/PDF reports.
• Steps:
  1. Expand Simulation Reports in the outline view.
  2. Configure with Report Outline option.
  3. Generate and export report in desired format.

Summary

• Quantitative post-processing with plots and reports in Ansys Fluent.
• Main aspects covered: XY graphs, combining plot data, fluxes, forces, surface and volume integrals, simulation report generation.