上浒充通大￥ 3.1雷诺输运定理 Shanghai Jiao Tong University 控制体(control volume):一个空间体积。 Mass 控制体积(control Volume):由一个 Mass entering leaving 固定空间构成的体积(a volume of fluid in a flow field,usually fixed in space,to be occupied by different Control volume fluid particles at different times.) n outward normal 控制表面(control Surface):控制体 积的封闭表面(imaginary or Mass leaving physical enclosing surface of a control volume,fluid particles can Bnet=Bou-Bn=pbv.nidA cross it)Shanghai Jiao Tong University 3.1 雷诺输运定理 控制体(control volume)：一个空间体积。 控制体积(control Volume): 由一个 固定空间构成的体积(a volume of fluid in a flow field, usually fixed in space, to be occupied by different fluid particles at different times.) 控制表面( control Surface): 控制体 积的封闭表面(imaginary or physical enclosing surface of a control volume, fluid particles can cross it)