heat coefient
 

I like to apply heat coefient In cfx on the walls,

as u may know in ansys or workbech ansys u have the option to apply hc as a function of temperature (t bulck) or as a function of differnce (delat t)between part and bulk

I know how to apply h as a function of t but i do not know how to apply it as a function of delta t

does any one know this?