ECOGEN v4.0

Major points:

• Removed the version numbers of the input file names (break compatibility with previous version).
• Possibility to use finite pressure relaxation on UEq model for more than two phases. More information in: Schmidmayer et al. https://doi.org/10.1002/fld.5142.
• Possibility to initialize an unstructured simulation with the result of a previous simulation performed on a similar mesh and/or a different number of CPUs. This feature is particularly useful to fasten steady state convergence on a fine mesh using coarse mesh results. More information in: Cazé et al. (2023). Modelling and simulation of the cavitation phenomenon in space-engine turbopumps. http://dx.doi.org/10.2139/ssrn.4479910.
• PUEq phase-change model (handled through PTMu relaxation) does not require mass fraction threshold anymore to trigger mass transfer. Also more information in: Cazé et al. (2023). http://dx.doi.org/10.2139/ssrn.4479910.
• Add Moving Reference Frame coupling of a rotating region with a static one. Also more information in: Cazé et al. (2023). http://dx.doi.org/10.2139/ssrn.4479910.
• Renamed boundary condition names (break compatibility with previous version).
• Immersed boundaries can be added in a Cartesian mesh domain (physicalEntity = -1). Similarly to: Trummler et al. https://doi.org/10.1017/jfm.2020.432.

Minor points:

• Option to record boundary quantities such as pressure forces and shear stress (useful for aerodynamic coefficient computation).
• Possibility to display cells' reference length on XML output with unstructured mesh.
• Add a tutorial on mesh mapping and low-Mach preconditionning options.
• Add scripts related to droplet shock-induced cavitation. More information in: Biasiori-Poulanges & Schmidmayer (2023) https://doi.org/10.1063/5.0127105 and Schmidmayer & Biasiori-Poulanges (2023) https://doi.org/10.1063/5.0151404.
• Improve variable name style for Gnuplot output.
• Increase code coverage by nonreg.
• Updated AMR refinement criteria to match the different modelling.
• Always a little more source code translation from French to English.
• A wall is now considered as a symmetry BC if viscosity is ignored.
• Update of documentation.

Fixes:

• Fix the getTemperature() and copyPhase() methods for multiphase models.
• Fix restart bug when using alphaNull on PUEq model.
• Fix bug on simulation progress when using iteration control mode.
• Fix a MPI data type that caused a crash during MPI_Allreduce on some compilers.
• Minor fix for Euler-Korteweg model.
• Correction on UEq BC for volume fraction flux, using sM instead of uStar to respect transport equation.
• Update non-regression scripts to make them compatible with OS X.
• Correction for phase change with a second-order method.

ECOGEN v3.1

Major points:

• Add velocity-equilibrium model. Read the following paper for more information: K. Schmidmayer, J. Cazé, F. Petitpas, E. Daniel, N. Favrie. "Modelling interactions between waves and diffused interfaces". 2021.
• Add velocity-equilibrium model based on total-energy equations. Read the previous paper for more information.
• Possibility to use another gradient method (Green-Gauss) which is compatible with unstructured meshes. Previously, finite differences were the only available.
• Possibility to use low-Mach preconditioning technique for Euler & pressure-velocity-equilibrium models.
• Option to use 1D with smooth cross-section-variation scheme (useful for nozzles).
• Add models augmented Euler-Korteweg and defocusing non-linear Schrödinger as well as Van der Waals equation of state. Mainly experimental work.

Minor points:

• Possibility to reduce output variable number for UEq and PUEq models.
• Restarting computation possible for all models for XML format output.
• Possibility to record flux on boundary (massflow, total enthalpy) and/or flow quantities (density, pressure, velocity) in agreement with Moving Reference Frame method.
• Possibility to set precision for specific outputs (probes, cuts, global quantities, boundary flux/quantities).
• Possibility to run test cases from a different folder.
• Minor modification of axi-symmetric computations for second-order simulations.
• Better handling of pressure relaxations when Newton-Raphson method does not converge.
• Update of documentation regarding test cases.

Fixes:

• Fix recording of probes with computational restart.
• Fix bug on unstructured meshes using hexaedron and prisms.
• Correction on NASG EOS to allow null volume fractions.
• Fix bug GNU dataset output precision.
• Fix bug AMR parallel when large domains were used
• Fix bug AMR parallel on printing of load.

ECOGEN v3.0.1

Corrections for older compilers.

ECOGEN v3.0

Warning Input files of this release are not fully compatible with older versions, see the manual files (in the folder libTests) or the up-to-date online documentation for more information.

ECOGEN v2.0

documentation update 2.0

ECOGEN v1.0

Update travis files