fluent中压力入口边界条件设置

压力的概念大概是这样的
在fluent中会出现这么几个压力:
Static pressure(静压) Dynamic pressure(动压) Total
pressure(总压)这几个压力是空气动力学的概念,它们之间的关系为:
Total pressure(总压)= Static pressure(静压z) + Dynamic
pressure(动压)滞止压力等于总压(因为滞止压力就是速度为0时的压力,此时动压为0.) Static
pressure(静压)就是你测量的,比如你现在测量空气压力是一个大气压
而在fluent中,又定义了两个压力:
Absolute pressure(绝对压力) Relative pressure(参考压力)还有两个压力: operating
pressure(操作压力) gauge pressure(表压)它们之间的关系为:
Absolute pressure(绝对压力)= operating pressure(操作压力) + gauge
pressure(表压)
上面几个压力实际上有些是一一对应的,只是表述上的差别,比如: Static pressure(静压) gauge
pressure(表压) 定义操作压力对于可压缩流动: 把操作压力设为0 把表压看作绝对压力
Defining Total Pressure and Temperature
Enter the value for total pressure in the Gauge Total Pressure
field in the Pressure Inlet
dialog box. Total temperature is set in the Thermal tab, in the
Total Temperature field.
7-66
Release 12.0 c ? ANSYS, Inc. January 30, 2009
7.3 Boundary Conditions
Remember that the total pressure value is the gauge pressure with
respect to the op-
erating pressure defined in the Operating Conditions dialog box.
Total pressure for an
incompressible fluid is defined as
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