5 Comments
  1. Arie Koot
    Arie Koot 5 years ago

    Abaqus with user subroutine: for example use C3D8T element: With this Temperature element water flow can be modeled

    • MohamadReza Kamali
      MohamadReza Kamali 1 month ago

      Hi Arie,
      I see several times you suggested using temperature instead of water flow, but I wonder how you did it. is it possible to describe a little about the procedure or provide an example file?
      Regards

      • Arie Koot
        Arie Koot 1 month ago

        I only have it for Vumat:

        Wateflow using temperature.

        type of calc: dynamic temperature-displacement explicit
        element type: C3D8RT
        output: temp and NT11 (element + nodal)
        QT=(T1-T2)*A*ktemp/L*dt [J]
        ΔT=Q/VRCtemp
        stable time < VRCtemp/∑A*ktemp/L
        example:
        mesh 0.1×0.1×0.1
        λ=200
        R=2800
        C=880
        stable time < 0.1×0.1×0.1x2800x880/(4*0.1×0.1×200)/0.1)=31sec
        general: stable time temp much higher than mechanical stable time

        Qw= ΔhxAxkw/L*dt = (P1-P2)/9810xAxkw/L*dt [m3]
        kw=m/s
        ΔP=Qw/VxEwbulk
        stable time < V/Ewbulk/∑A*kw/9810/L

        thus ktemp=conductility=Kw/9810
        thus Ctemp=specified heat= 1/Ewbulk/R

        in vumat: Enerpl(new)=Enerpl(old)+plasticenergy/R
        for waterflow: Enerpl(new)=Enerpl(old)+(pwnew-pwold)/Ewbulk/R

  2. HAFSSA TOUNSI
    HAFSSA TOUNSI 5 years ago

    COMSOL. This tutorial could be of great help :
    https://www.comsol.fr/model/biot-poroelasticity-483

  3. David Mašín
    David Mašín 5 years ago

    This can be done by most of the software here. For Plaxis, see this tutorial: https://www.plaxis.com/support/tutorials/plaxis-3d-tutorial-rapid-drawdown-analysis/

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