Solvers

Numerical algorithms solve the systems of equations that Simcenter STAR-CCM+ constructs from the chosen models and their boundary conditions.

Precision

Simcenter STAR-CCM+ is available as mixed or double precision.

Finite Volume Method

  • Segregated flow solver
    • Automatic continuity initialization
  • Coupled flow solver
    • Automatic CFL control and explicit under-relaxation
    • Grid-sequencing initialization
    • Convergence accelerators
  • Coupled flow and energy solver with segregated species solver
  • SIMPLE (steady and unsteady), PISO (unsteady only), and SIMPLEC (unsteady only) solution algorithms
  • Algebraic multigrid linear solver
  • Harmonic balance method for periodic unsteady flows and single frequency electromagnetics
  • Discretization schemes
    • For convection: first-order upwind, second-order upwind, central-differencing (regular and bounded), hybrid second-order upwind/CD (regular and bounded), hybrid MUSCL 3rd-order/CD
    • For time: first-order (Euler implicit), second-order (with 3, 4, and 5 time levels)

Finite Element Method

  • Shared or distributed memory linear direct solvers
  • In-core or out-of-core memory storage
  • Memory estimation
  • Multi-threading
  • Applies to:
    • Solid mechanics
    • Viscous flow
    • Magnetic Vector Potential

High Performance Computing

  • Parallel execution using the Message Passing Interface (MPI)
  • Automatic decomposition for parallel execution
  • GPGPU computation supported for certain solvers

  • Cloud computing support via Simcenter Cloud HPC

  • For provided and supported MPI implementations, see the Simcenter STAR-CCM+ User Guide, Client-Server Setup > Working With Parallel Servers > Supported MPI Implementations
  • Parallel disk I/O