mdnode

    Enables extra connections to be made to nodes. This is useful for simulating wellbore connections, faults, and flow across internal boundaries.

    • Group 1 - NUM_MD, MAX_CON, IELIM, SX_MULT
    • Group 2 - NODE, IPAR, NPAR (repeated NUM_MD times)
    Input Variable Format Default Description
    NUM_MD integer 0 Number of new connections to be entered.
    MDMAX integer 0 Maximum number of new connections to a given node. This does not include old connections. Thus, if a node was already connected to 5 neighboring nodes and two new connections were added to this node in this macro statement and this was the maximum number of connections added in this macro statement, then MDMAX = 2.
    I_ELIM integer 0 IF I_ELIM Š 0, then no action. IF I_ELIM < 0, then nodal connections are eliminated as needed if redundant.
    SX_MULT real*8 1.0 Multiplier for equilibrium conditions.
    NODE integer 0 Node to which new connection is established.
    IPAR integer 0 IPAR is not used at present. Its value is ignored. However the entered number must be an integer.
    NPAR integer 0 NPAR is the new connected node. If NPAR = NODE, no new connection is established.

    The following are examples of mdnode. In the first example (top), 3 new connections are specified, node 10 is connected to node 15, node 100 is connected to node 106, and node 10 is connected to node 320. A maximum of 2 new connections are allowed per node. The multiplier for equilibrium conditions is set to 10. In the second example (bottom), 4 new connections are specified, node 1 is connected to node 16, node 2 is connected to node 1, node 4 is connected to node 1 and node 10 is connected to node 203. A maximum of 3 new connections are allowed per node. The multiplier for equilibrium conditions is set to 100.

    mdnode      
    3 2 0 10
    10 0 15  
    100 0 106  
    10 0 320  
    mdnode      
    4 3 0 100
    1 0 16  
    2 0 1  
    4 0 1  
    10 0 203  

    © Copyright 2018, Los Alamos National Laboratory