[reza67]

hello everyone
I am modeling a system in which the temperature of a ground needs to change with time and with depth . A thin pipe (carrying hot liquid) is passing through the ground and the temperature of the soil around the pipe is affected by that.
So, how do I provide a time-dependent cell zone temperature condition? I cannot use "Fixed value" because the temperature profile inside the soil needs to be affected by the pipe. Can I use "Source term" somehow for this?
although I must write a UDF but how and where do I use it? Please help me out.
the equation is :
T_soil = T_avg - A exp[-z (π/365a)^(1⁄2) ]∙ cos{2π/365 [t-t0 - z/2 (365/πa)^(1/2) ]}
thanks

[reza67]

any idea ???