OpenFOAM中可以通过codedFixedValue边界条件来实现空间及时间分部的边界条件
举个栗子，在射流外设置一个线性分布的速度场
AirInlet
{
//type fixedValue;
//value uniform (0 0 0.61);
type codedFixedValue;
value uniform (0 0 6.10);
name linearVelocity;
code
#{
const vectorField& Cf = patch().Cf(); //center of the patch
vectorField& field = *this; //the target velocity field
const scalar Umax = 6.1;
const scalar r1 = 0.02; //radius of the hot coflow
const scalar r2 = 0.06; //radius of the domain
forAll(Cf, faceI)
{
const scalar x = Cf[faceI][0];
const scalar y = Cf[faceI][1];
const scalar R = sqrt(x*x+y*y);
if(R>r1){
field[faceI] = vector(0,0,Umax*(r2-R)/(r2-r1));
}
}
#};
}
如需要设置随时间变化的边界条件，可采用如下方法得到OF运行时间
this->db().time().value();
