[wangziyang]

hello everyone

i want to calclulate du.x/dt in controlDict using swak4Foam, but i don't konw how to write the derivation in swak4Foam

here is the example:

uix
{
type expressionField;
autowrite true;
expression "du.x/dt";
outputControl outputTime;
dimension [0 1 -2 0 0 0 0];
fieldName uix;
}

How do I write this expression "du.x/dt" in "uix"?

ziyang