Steady state Conservation of mass ∑m=∑m (mass rate in) (mass rate out) Conservation of energy 0 7 a-晚+(a+兰+)区a(+兰+x) ,'dt a.+ya+兰+)-成+公e+誉+) (energy rate in) (energy rate out 上游充通大学 March 26,2019 10 SHANGHAI JLAO TONG UNIVERSITYMarch 26, 2019 10 Steady state 0 Conservation of mass Conservation of energy