I want to set a user defined function as a boundary condition. For example,

ebc_1 = {

    'ebc_inlet' : ('inlet',  {'u.[0,2]' : 0, 'u.1' : myfunc},

}

myfunc(ts, coors, **kwargs):

 ...

what type of an object is coors? how can I write the x, y and z coordinates in terms of the variable coors?

Best regards,

Nikhil