0

Tough+Hydrate Model Initialization to Steady state : Pressure gradient appears but Temperature gradient disappears

Test.txt

Hello Everyone. I am trying to run the model to steady state. 

I have a 190 x 1000 model.

I fixed the top boundary to  6.5C and 104bar by making the cells inactive

I set simulation end time to (10,000 years).

I get pressure gradient, but temperature gradient disappears.

Please help, file is attached herewith

9 replies

null
    • kenny
    • 1 yr ago
    • Reported - view

    you may need to fix the temperature at bottom. There is no gravity equilibrium for temperature.  

    • Castleberry
    • 1 yr ago
    • Reported - view

    Well Kenny, if i make the bottom cell fixed, how would then hydrostatic pressure distribution change?

    are you asking me to fix both top and bottom conditions?

    • kenny
    • 1 yr ago
    • Reported - view

    Only the temperature fixed at bottom, not pressure. To fix the temperature, you may use a large DROK rock grain density (1.0e50) for the bottom boundary.

      • Castleberry
      • 1 yr ago
      • Reported - view

      Kenny i have tried this and unfortunately it does not work...anyways I appreciate your comments on this post. 

      I will try other combinations and post in case I achieve my objective 

    • kenny
    • 1 yr ago
    • Reported - view

    Use large rock density to fix a gridblock temperature is the standard approach for TOUGH. It should work.

      • Castleberry
      • 1 yr ago
      • Reported - view

      kenny sure....will keep you posted...once I have the results. Thanks kenny

      • Castleberry
      • 8 mths ago
      • Reported - view

       Hi
      I want to ask you whether the process of getting steady state temperature and pressure distribution can be achieved in a single step?

      or pressure gradient achievement is to be done in a single step and temperature gradient be achieved in a separate run?

      • kenny
      • 8 mths ago
      • Reported - view

       I do not think so. When a system is highly heterogeneity, it may be difficult to reach the steady state. 

    • Sunny_Dai
    • 3 wk ago
    • Reported - view

    Sir, I have also encountered such a problem. Have you resolved it? Can you tell me the method?

Login to reply

Content aside

  • 3 wk agoLast active
  • 9Replies
  • 97Views
  • 3 Following