Fande Kong

Allow boundary be associated with child elements

15

Use case: moving boundary with AMR. Boundary needs to be defined on child elements

General multiapp field transfer

9

Created a new transfer Working on these features 1) Block restricted transfers #16427. 2) MultiApp transfers support array and vector variables #16429

Valgrind error

3

It seems that HYPRE is not valgrind clean A petsc example: ``` [rocky-8][~/workhome/rod/moose/petsc/src/ksp/ksp/tutorials]> valgrind --leak-check=full --tool=memcheck --dsymutil=yes --track-origins=yes --demangle=yes ./ex29 -ksp_view -pc_type hypre ==3240472== Memcheck, a memory error detector ==3240472==...

Preallocation of matrix memory

21

### Description of the enhancement or error report Preallocation of matrix memory is crucial for good performance for large problems. There are more details at https://www.mcs.anl.gov/petsc/documentation/faq.html There are two issues...