Unstructured grid computational fluid dynamics

Unstructured Grid Computational Fluid Dynamics (CFD) Software (HCFDLab)

NO.1 Software Introduction

1. Software Name: Unstructured Grid Computational Fluid Dynamics (CFD) Software (HCFDLab).
2. Type: Fluid dynamics.
3. Basic Theoretical Method: Solves Navier-Stokes (N-S) equations using unstructured grids.
4. Main Functions:Computes detailed flow field information for complex configurations based on N-S equations, including:Large passenger aircraft，Fighter jets，Transport aircraft，Drones，Rockets and missiles，Various other flight vehicles.
5. Application Fields:
   • Currently used in aerospace and other domains.
   • Extendable to:Shipbuilding，Petroleum，Chemical engineering，Wind power，Automotive，High-speed rail，Architecture，Bridges，Tunnels。Mining，Weapons and ammunition，Bioengineering，Heat transfer in electronic devices (e.g., chips, large lasers, accelerators)，Thermal-hydraulic calculations for nuclear reactors.
6. International Comparable Software:
   ANSYS-FLUENT, ANSYS-CFX, NUMECA, CFD-FASTRAN, STAR-CCM+, POLYFLOW, XFLOW, Phoenix, etc.
7. Comparison with International Software:
   • ANSYS-FLUENT is currently the most widely used CFD software in China.
   • HCFDLab offers comparable accuracy but higher computational efficiency.
   • Advantages of HCFDLab:
     • Possesses proprietary source code, ensuring autonomy and controllability.
     • Can rapidly integrate the latest computational schemes and theoretical algorithms (e.g., effects of unit Reynolds number on transition at high Mach numbers, new turbulence/transition models).
     • ANSYS-FLUENT is a closed-source executable; users cannot modify or add features, which affects accuracy (e.g., lift-to-drag ratio calculations for aircraft) and computational security.
     • Licensing: ANSYS-FLUENT charges per user and compute node, while HCFDLab currently offers unrestricted access to internal users without such fees.

NO.2 Application Example

a. Name: Aerodynamic Calculation for High-Speed Train with Pantograph.
b. Problem Characteristics: Coupled interaction between the train body and elastic pantograph.
c. Numerical Methods:Inviscid flux scheme: AUSM+，Time advancement: 2nd-order backward difference，Turbulence model: SST (Shear Stress Transport).
d. Computational Grid:Unstructured grid，Total grid count: 2 million.

Contact:

Prof. Tian：WhatsApp：+86 15029941570 | Mailbox：540673737@qq.com