连界条件设置问题

铸件之间应该不用设置边界条件吧，铸件在模拟中是空的，需要流体填充。
我想楼主是不是想问模具之间接触的设置问题啊？
Heat transfer between any two components N and M can be specified using HTCOB(n,m) in namelist OBS to define a thermal resistance at the contact surface between the two components, in addition to thermal conduction. This lets the user take into account gaps between components. If HTCOB is not specified, the components are assumed to have perfect contact, and the effective conductivity between the two components will be used in the conduction equation

问题是边界类型只有symmetry, continuative ，specified pressure , grid overlay ,mesh block , wall , periodic , specified velocity , outflow这几种，没有空冷边界条件呀。铸型与空气的边界条件为symmetry

铸型外应为空冷条件呀。