CFD: All Levels

CFD: All Levels

12
7h 47s
  1. Section 1

    Introduction

  2. Section 2

    Finite Volume Method (FVM)

  3. Section 3

    Solver Types and Pressure-Velocity Coupling Methods

  4. Section 4

    Density-Based Solvers and Numerical Schemes

  5. Section 5

    Discretization Methods

  6. Section 6

    Cavity Flow

  7. Section 7

    Algorithms

  8. Section 8

    Foundations of Computational Fluid Dynamics

  9. Section 9

    Poiseuille Flow

  10. Section 10

    Airfoil

  11. Section 11

    Pipe Flow

  12. Section 12

    Compressible Flow

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CFD: All Levels — Ep 01

Discretization Methods and Numerical Schemes in ANSYS Fluent

Episode
01
Run Time
23m 45s
Published
Feb 03, 2025
Topic
CFD
Course Progress
0%
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About This Episode
  1. Gradient Calculation Methods

A. Green-Gauss Cell-Based Method

  • Cell-centered value approach
  • Volume-weighted calculations
  • Uniform grid applications
  • Computational efficiency

B. Green-Gauss Node-Based Method

  • Node value utilization
  • Enhanced accuracy for irregular meshes
  • Mesh type limitations
  • Resource requirements

C. Least Squares Cell-Based Method

  • Neighbor cell consideration
  • Accuracy-efficiency balance
  • Unstructured mesh optimization
  1. Pressure Discretization Options

A. Second-Order Scheme

  • Taylor Series implementation
  • Gradient consideration
  • Enhanced accuracy features

B. Standard Scheme

  • Weighted averaging approach
  • Distance-based calculations
  • Basic flow applications

C. PRESTO Scheme

  • Staggered control volume
  • Universal mesh compatibility
  • Complex flow handling

D. Specialized Schemes

  • Linear averaging method
  • Body Force Weighted approach
  • Application-specific solutions
  1. Momentum Discretization Methods

A. First-Order Upwind

  • Basic implementation
  • Solution stability
  • Accuracy trade-offs

B. Advanced Schemes

  • Second-Order Upwind
  • QUICK (Quadratic Upstream Interpolation)
  • MUSCL (Monotonic Upstream-Centered)
  1. Implementation Considerations

A. Application Areas

  • Energy equations
  • Turbulence modeling
  • Radiation calculations
  • Species transport

B. Selection Criteria

  • Accuracy requirements
  • Computational resources
  • Mesh characteristics
  • Flow complexity level

This overview provides essential understanding of discretization methods in ANSYS Fluent, crucial for achieving optimal CFD simulation results while managing computational resources effectively.