Freeflow Technical Manual

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1. Introduction

1.1. About the SPH method
1.2. Functionality details

2. SPH Adaptive Sizing (Beta)

2.1. SPH Adaptive Sizing Method Overview

2.1.1. Ansys FreeFlow Implementation

2.2. Refinement with boundary proximity

2.3. Refinement with Region of Interest (ROI)

2.4. Coarsening

2.5. Limitations of the SPH Adaptive Sizing

3.1. Overview of SPH

3.2. Kernel functions

3.3. Fluid dynamics formulation

3.3.1. Equation of state (WCSPH)
3.3.2. Pressure acceleration
3.3.3. Viscous acceleration
3.3.4. Viscous Force Solution (Beta)

3.4. Turbulence modeling

3.4.1. Laminar option
3.4.2. Large Eddy Simulation (LES) model

3.5. Surface Tension models

3.5.1. Continuum Surface Force (CSF)
3.5.2. Constant Surface Stress (CSS)
3.5.3. Pairwise Potential

3.6. Position correction

3.6.1. XSPH approach
3.6.2. Shift approach

3.7. Density correction

3.8. SPH time step calculation

3.9. Wall boundary conditions

3.10. SPH Boundary Interaction Statistics

3.11. SPH HTC Calculator

3.12. Eulerian Solution

3.13. SPH Thermal Model

3.13.1. SPH Thermal Model: Setting up
3.13.2. SPH Thermal Model: Technical details

3.14. IISPH - Implicit Incompressible SPH and DFSPH - Divergence Free SPH (Beta)

3.14.1. Relaxed Incompressibility Constraint (BETA)

Bibliography