rhoSimpleFoam - OpenFOAM Solver

Solver: rhoSimpleFoam   Description

rhoSimpleFoam is a pressure-based solver designed for steady-state simulations of compressible flow. It handles laminar and turbulent, single-phase flows with temperature and density variations (it solves the energy equation).

The solver uses the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) algorithm for pressure-momentum coupling, augmented by under-relaxation techniques to enhance convergence. It supports Multiple Reference Frame (MRF), porosity modeling and allows easy integration of passive scalar transport equations and source terms.

It finds extensive use in fields where the effects of compressibility are non-negligible. This includes high-speed aerodynamics in the automotive and aerospace industries for applications like engine inlets and exhaust systems, supersonic flow over airframes, and HVAC systems dealing with high-temperature gradients.

Solver: rhoSimpleFoam   Features

  • Steady-State
  • Compressible
  • Single-Phase
  • Subsonic Flow
  • Transonic Flow
  • Pressure-Based Solver
  • Laminar and Turbulent (RANS, LES, DES)
  • Equation of State Models
  • Rotating Objects:
    • Multiple Reference Frames (MRF)
  • Passive Scalar
  • Porosity Modeling
  • Heat Transfer
  • Heat Source
  • Source Term (explicit/implicit)
  • SIMPLE Algorithm
  • Solution Limiters:
    • Velocity Damping
    • Pressure Limit
    • Temperature Limit

Solver: rhoSimpleFoam   Application

Aerospace

  • Aircraft Aerodynamics
  • Wing Optimization and Motion
  • Jet Engines
  • High-Speed Aerodynamics
  • Supersonic Flow

Automotive

  • Airflow Ducts
  • Intercooler Flows

Spacecrafts

  • Rocket Engine
  • Propulsion Systems

Energy

  • Steam Turbines

Manufacturing

  • Supersonic Cold Spray - Additive Manufacturing Process

Rotating Machinery

  • Centrifugal Pumps

Solver: rhoSimpleFoam   Compressible Solvers Comparison

Compressible Solvers In this group, we have included single-phase, pressure and density-based solvers that can handle flows with significant variations in density, mostly applicable for low and high-speed aerodynamics (Ma > 0.3)

Subsonic / Transonic, Ma < 1

  • rhoSimpleFoam steady-state, pressure-based, small density changes
  • rhoPimpleFoam transient, pressure-based, small density changes, DyM

Transonic / Supersonic, Ma > 1

  • Ma - Mach Number
  • DyM - Dynamic Mesh
  • Overset - also known as Chimera Grid (Method)

Solver: rhoSimpleFoam   Alternative Solvers

In this section, we propose alternative solvers from different categories, distinct from the current solver. While they may fulfill similar purposes, they diverge significantly in approach and certain features.

  • simpleFoam incompressible version of rhoSimpleFoam, constant density
  • buoyantSimpleFoam variant of rhoSimpleFoam solver for buoyancy-driven flow