Timing of data writes Version 2.1.0 includes some new controls for timing the writing of results to file. Secondary controls in controlDict In addition to the standard writeControl and writeInterval settings, optional secondary write controls are now available in the controlDict file through the secondaryWriteControl and secondaryWriteInterval keywords. For example, for an extra dump of […]

Time-Dependent Conditions Users can now initialise a range of boundary conditions (BCs) to be time-varying. This feature has been made available by incorporating the DataEntry class into BCs. The time-varying options are described below using the uniformFixedValue BC example, that requires the user to specify the value by the uniformValue keyword entry. constant value uniformValue […]

Turbulence Modelling Version 2.1.0 includes the  (low-Re) model for Reynolds-average simulation of incompressible flows with a boundary layer that undergoes a transition from laminar to turbulent flow. The model is described in D. K. Walters and D. Cokljat, J. Fluids Eng. 130:121401 (2008) and is based on the  model with an additional transport equation included […]

Multiphase interface-capturing The multiphaseInterFoam solver, for interface-capturing for systems with 3 phases or more, now uses the new multiphase MULES functionality to guarantee that all phase fractions are bounded and sum to 1. The updated solver is significantly more stable and more accurate than in earlier versions of OpenFOAM, making it an effective solver over […]

Arbitrary Mesh Interface (AMI) for non-conformal patches has been implemented based on the algorithm described in P. E. Farrell and J. R. Maddison, Comput. Methods Appl. Mech Engrg 200:89 (2011). AMI is a technique that allows simulation across disconnected, but adjacent, mesh domains. The domains can be stationary or move relative to one another. The […]

In addition to new features described on other pages linked to from the version 2.0.0 release announcement, there are some other new developments in OpenFOAM. Other new solvers adjointShapeOptimizationFoam – steady-state solver for incompressible, turbulent flow of non-Newtonian fluids with optimisation of duct shape by applying ”blockage” in regions causing pressure loss as estimated using […]

Cyclic Boundary Condition The cyclic boundary condition, also know as a periodic boundary condition, treats 2 boundary regions as if they are physically connected. They are used for repeated geometries , e.g. heat exchanger tube bundles. In versions of OpenFOAM before v2.0.0, a cyclic patch contained the faces for both regions of the boundary, i.e. cyclic […]

Run-time Code Compilation OpenFOAM now includes the capability to compile, load and execute C++ code at run-time. It includes a new general directive called #codeStream that can be used in any input files for run-time compilation. For example, the following code in the controlDict file looks up dictionary entries and does a simple calculation for […]

Function Objects OpenFOAM can carry out post-processing (and run-time control) automatically while the simulation is running using function objects. In v2.0.0, the range of available functionality has been extended to include the following: abortCalculation – Watches for presence of the named file in the case directory and aborts the calculation if it is present. coded […]

Dynamic Lagrangian Model The latest release includes the new dynLagrangian large eddy simulation (LES) turbulence model, a Lagrangian two equation eddy-viscosity model. In LES, large turbulent structures in the flow are resolved by the governing equations, while the effect of the sub-grid scales (SGS) are modelled. Conventional models predict SGS viscosity with a model constant, […]