CASL

Thermal Hydraulics Methods (THM)

Delivers next-generation thermal-hydraulic simulation tools to Virtual Environment for Reactor Applications (VERA)

Thermal Hydraulics Methods

Objectives and Strategies

  • Deliver next-generation T-H simulation tools to VERA, interfaced with the latest VUQ technologies, and accommodate tight coupling with other physics
  • Computational Fluid Dynamics (CFD): Deliver scalable, verified and validated CFD tools
  • Closure Modeling (CLS): Exploit micro-scale simulation results and experimental data for CFD closure models and validation based on new physical understanding
  • Leveraging capabilities of THM teams to deliver state-of-the-art models and methods for T-H simulation

Requirements Drivers

Thermal-hydraulics capabilities based on 3D single and multiphase computational fluid dynamics for a component-scale capability incorporating micro scale simulation results and experimental models into CFD closure models

  • Scalable parallel algorithms for turbulent single and multiphase flows suitable for advanced computer architectures
  • Ability to perform single/multiphase CFD calculations in realistic reactor component geometries
  • Advanced closure models applicable to turbulent, boiling multiphase flows

Leveraging capabilities from NE, DOE Science and NNSA efforts

Outcomes and impact

VERA will have the latest flow capability:

  • Single and multiphase CFD
  • State-of-the-art boiling closure models
  • Coupled with and targeted towards reactor physics for challenge problems
  • Scalable software on the latest computer architectures