Where to set the molecular weight for the solid phase?

hermit

I am trying to simulate a 2-phase flow. One phase is gas, the other is solid particulates. But the *.fc file failed to be run by the CFX solver. The generated *.fo file keeps telling me fhe following,
                 
####> ERROR. IN DATA FOR PHASE      2
THE MOLECULAR WEIGHT =  -1.0000E+00 THIS MUST BE SET BY THE USER AND HAVE A VALUE GREATER THAN 0.0
THE CFX-4 SOLVER HAS BEEN STOPPED BY SUBROUTINE SPEC1
Can anyone please tell me where I am supposed to set the molecular weight for the solid phase? Thanks in advance.

windhair

我正在做一些混合流动的问题,没有两相的问题,但是里面也有多成分的定义问题.
有关的定义是这样做的:
>>CFX4
>>OPTIONS
    ...
    MASS FRACTION EQUATIONS 1 /* 设定设计传质的组分数目 */
    MAXIMUM NUMBER OF MATERIAL TYPES 1
>> VARIABLE NAMES
    MASS FRACTION1 "H2"
........
>> MODEL DATA
  .....
  >> PHYSICAL PROPERTIES
   ...
   >> MASS TRANSFER PARAMETERS
     >>MOLECULAR WEIGHTS
       H2 2.0     /*  组分分子量 */
.......

hermit

Windhair, thanks for your information.
I am aware of the command lines you wrote, which is about the case of Multi-component flow. My question is if I am to model a multi-phase single-component flow, where am I supposed to set the parameters (e.g. molecular weight, thermal diffusivity,etc.)for a specific phase, especially a solid phase, the physical properties of which are not provided in the PCP database of CFX program.

windhair

我没有做过multi-phase 的计算,不过我在手册里面查到一些设置方法,看看有没有用.
>>MODEL DATA
  >>HYSICAL PROPERTIES
    >>FLUID PARAMETERS
      PHASE NAME 'PHASE1'
      VISCOSITY 1.0E-5
      DENSITY 1.0
    >>FLUID PARAMETERS
      PHASE NAME 'PHASE2'
      VISCOSITY 1.0E-3
      DENSITY 1.0E+3
    >>HEAT TRANSFER PARAMETERS
      PHASE NAME 'PHASE1'
      THERMAL CONDUCTIVITY 1.0E-2
      FLUID SPECIFIC HEAT 1.0E+3
    >>HEAT TRANSFER PARAMETERS
      PHASE NAME 'PHASE2'
      THERMAL CONDUCTIVITY 1.0E-2
      FLUID SPECIFIC HEAT 1.0E+3
   >>MASS TRANSFER PARAMETERS
     >>DIFFUSIVITIES
      PHASE NAME 'PHASE1'
      DIFFUSIVITIES 1E-05
     >>MOLECULAR WEIGHTS
      PHASE NAME 'PHASE1'
      MOLECULAR 23.0
   >>MASS TRANSFER PARAMETERS
     >>DIFFUSIVITIES
      PHASE NAME 'PHASE2'
      DIFFUSIVITIES 2E-05
     >>MOLECULAR WEIGHTS
      PHASE NAME 'PHASE2'
      MOLECULAR 38.0

wxm235

我觉得你试试检查一下，两相的体积分数是否加起来为1.0。

windhair

That is a example, not real parameters