Fluid/heat infilitration through a surface

[slam00000]

Does any one know how we apply fluid infilitration (Influx)through a surface?
I am using Pore Fluid Force which should lead to increasing the addition of water into the system and thus raising the water level within the system but that doesnot happen. Instead, the water level decreases upon application of this forec.
Thanks for help

 

[slam00000]

This is further explination of the issue
I analyze the problem in this way ( water flow (influx)is analogous to heat flow (influx) with pore pressure (P) corresponds to temperature (T). The isoline P=0 (T=0) which is much below the 2D part surface divides the part into two zones (i)zone having negative P or T located between the top surface and line P or T=0 (ii)zone having positive P or T located below the isoline (P or T=0)
I have some water (heat) influx peneterating (infilitration) the top surface and entering into the part (where P or T values on that surface are negtive).I have the amount of influx as (say) q= 10E-06 (m/s)when putting it a positive this force is shown as downward force but the result shows that the line P or T=0 becomes lower.As if you are entering heat influx into the system but your system becomes colder instead of becoming warmer.
However if I did it negative the force will be directed upward but my water/heat infiltration is hapening downward.!!
Is the water/heat infilitration cannot be represented by this surface force. How one can apply the heat infilitration into a surface?. Should one calcualte the conjugate/ T or P corresponding to the infilitration q via q=(k)(T-Tr)[where Tr is a reference value, k is conductivity through the charcteristic length) and then apply this conjugate as BC on that top surface.
Thank you