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add the numerical stabilization type "FCT" and apply it to ComponentTransport process

HBShaoUFZ requested to merge HBShaoUFZ/ogs:FCT into master

A new stabilization type FluxCorrectedTransport (FCT) is added in this MR. This feature corrects the mass (M) and conductance (K) matrix after they have been assembled, in order to prevent any flux that is against the gradient of primary variable. After this feature is applied to ComponentTransport process, negative concentrations will be suppressed, when there is strong advection vs dispersion/diffusion. A test case has been added along with the documentation for this feature.

  1. Feature description was added to the changelog
  2. Tests covering your feature were added?
  3. Any new feature or behavior change was documented?
Edited by Dmitry Yu. Naumov

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