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Created by James Willenbring@jmwilleOwner

MueLu: linear interpolation data with structured aggregation

Created by: lucbv

@trilinos/muelu @rstumin @jhux2 @csiefer2 @mayrmt

Expectations

Have the structured aggregation algorithm provide a sufficient amount of data for linear interpolation to be performed using the aggregates as input.

Current Behavior

Currently only piece-wise constant interpolation is performed due to the aggregates data format

Motivation and Context

This work will enable potentially more accurate transfer operators in MueLu while keeping the overall framework the same. This work will support some aerodynamic and MHD applications that have structured or block structured meshes.

Definition of Done

The aggregates store the Ids of all the coarse nodes needed for interpolation at each fine point.

Possible Solution

Mainly change the type of the attribute vertex2AggId from LOVector to LOMultiVector. This has a sizeable impact on MueLu since that attribute is used a lot during aggregation and transfer operator calculations.

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