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What is the term fvm::UDiv(U) in pUCoupledFoam

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Old   October 21, 2021, 23:40
Default What is the term fvm::UDiv(U) in pUCoupledFoam
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Nguyen Trong Hiep
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Hi all,
I am reading source code of pUCoupledFoam but i can't understand what is UDiv(U).
Can anyone help me pls.
    // Calculate grad p coupling matrix. Needs to be here if one uses
    // gradient schemes with limiters.  VV, 9/June/2014
    BlockLduSystem<vector, vector> pInU(fvm::grad(p));

    // Calculate div U coupling.  Could be calculated only once since
    // it is only geometry dependent.  VV, 9/June/2014
    BlockLduSystem<vector, scalar> UInp(fvm::UDiv(U));
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