17)

Note

These are the running release notes for the daily version of Aria, accumulated since the last release. Version 5.20 is set for release in Summer 2024.

New Features

Can now use globals in string functions without using a global user expression. e.g. density = scalar_string_function f = "temperature/my_gvar.global"
Linear Solver Improvements:
- Improvements to Teko linear solvers and documentation. Please consult Road-map for Constructing Teko Solvers for additional information.
- Two new MueLu preset solvers: thermal_multigrid and high_aspect_continuity.
The MPMD coupling strategy has now been generalized for flexibility:
- These changes are now tracked by a coupling version, which will ensure backwards compatibility with older versions of coupled apps
- Support for send field and receive field relaxation has been added for the implicit coupling.
- A –tftklog coupling_output command line switch has been added to help investigate issues with convergence in implicit couplings by outputting intermediate iterations to the results files.
Clamping anti-windup has been added to the PID Controller which matches the behavior of Matlab Simulink. A conversion script has also been provided for matching Labview (see discussion for caveats).
Advective bars can now be coupled to CVFEM porous enthalpy equation.

Bug Fixes

Using a tensor_string_function for intrinsic permeability now automatically includes the intrinsic_permeability_scaling term, which is included in other intrinsic permeability models but was missing from the string function models. Also added scaling to the Young and Todd model and enforced consistent subindex and phase rules (the intrinsic permeability scaling is expected to be in the SOLID_PHASE and can use a species subindex to be applied to a per-species intrinsic permeability).
Postprocessed string functions that use globals will now use the up-to-date global value, whereas previously the string function would have used the previous time-steps global value.

Change in Behaviors

By default, the preset linear solvers will use the automatic convergence tolerance, see Tolerance Settings.
Gradient of a vector field now returns the gradient of each vector component stored row wise. Indexes should be flipped when referring to the corresponding tensor components in string functions (e.g., T_XY, the partial derivative of the y component with respect to x, is now accessed via T_YX).