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SUNDIALS v6.6.0
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@gardner48 gardner48 released this 20 Jul 19:09
· 197 commits to main since this release
v6.6.0
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gardner48 David Gardner
SSH Key Fingerprint: qYLY4EZLxxBNzu72w/zlo99PJwZzmY2gMd7QCS5nnx4 Learn about vigilant mode.
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Learn about vigilant mode.

A new time-stepping module, SPRKStep, was added to ARKODE. This time-stepper provides explicit symplectic partitioned Runge-Kutta methods up to order 10 for separable Hamiltonian systems.

Added support for relaxation Runge-Kutta methods to ERKStep and ARKStep in ARKODE.

Added the second order IMEX method from Giraldo, Kelly, and Constantinescu 2013 as the default second order IMEX method in ARKStep. The explicit table is given by ARKODE_ARK2_ERK_3_1_2 and the implicit table by ARKODE_ARK2_DIRK_3_1_2.

Updated CVODE, CVODES and ARKODE default behavior when returning the solution when the internal time has reached a user-specified stop time. Previously, the output solution was interpolated to the value of tstop; the default is now to copy the internal solution vector. Users who wish to revert to interpolation may call a new routine CVodeSetInterpolateStopTime, ARKStepSetInterpolateStopTime, ERKStepSetInterpolateStopTime, or MRIStepSetInterpolateStopTime.

A potential bug was fixed when using inequality constraint handling and calling ARKStepGetEstLocalErrors or ERKStepGetEstLocalErrors after a failed step in which an inequality constraint violation occurred. In this case, the values returned by ARKStepGetEstLocalErrors or ERKStepGetEstLocalErrors may have been invalid.

Updated the F2003 utility routines SUNDIALSFileOpen and SUNDIALSFileClose to support user specification of stdout and stderr strings for the output file names.

Assets 9
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