请问一下star-cd如何计算Nu值 (无内容)

ansys999999

tomosada

這個問題 很多人問過了歐
首先你需要先知道 Nussel number 的定義
之後再利用 operator進行計算即可得
adapco-online上面有範例啦  寫成panel了

(4) Calculation of Nusselt Number:
The Nusselt number can be calculated based on either the HTRAN heat tranfer coefficient or the HCOEFF heat transfer coefficient. Both are shown below using the relationship Nu = HTC * DIAM / KT.

! Calculation of Nusselt number based on HTRAN:
!
*SET DIAM 0.1
*SET KT 0.60
!
!-Create boundary wall shells for region of interest:
!
BSET,NEWS,INLET
VSET,NEWS,BSET
CSET,NEWS,FLUID
CSET,SUBS,VSET
VSET,NEWS,CSET
CLRWALL
*GET,MXCT,MXCT
GETW,HTRAN
!
! Isolate the wall boundary shells:
!
CSET,NEWS,TYPE,MXCT + 2
CSET,SUBS,VSET,ALL
POPT,CONT
PLTY,EHID
WPLOT
!
!-Calculate Average HTRAN for CSET:
!
*GET,HTRAN,RAVG,4
!
!-Calculate the Nusselt number:
!
*SET,NUHT,HTRAN * DIAM / KT
*LIST,NUHT
!
! Calculation of Nusselt number based on HCOEFF:
!
*SET DIAM 0.1
*SET KT 0.60
!
!-Calculate Bulk Mean Temperature:
!
BSET,NEWS,INLET
VSET,NEWS,BSET
CSET,NEWS,FLUID
CSET,SUBS,VSET
VSET,NEWS,CSET
!
! Use W velocity
!
OPER,GETC,SW,1
OPER,GETC,T,2,RELA
OPER,GETC,VOLU,3
OPER,MULT,1,3,4
OPER,MULT,2,4,5
!
! Work out volume averaged TBLK
!
*GET,WV,RTOT,4
*GET,TWV,RTOT,5
*SET,TBLK,TWV / WV
!
!-Load HCOEF based on TBLK:
!
CLRWALL
*GET,MXCT,MXCT
GETW,HCOEF,TBLK
CSET,NEWS,TYPE,MXCT + 2
CSET,SUBS,VSET,ALL
POPT,CONT
PLTY,EHID
WPLOT
!
!-Calculate Average HCOEF for CSET:
!
*GET,HCOEF,RAVG,4
!
!-Calculate the Nusselt number:
!
*SET,NUHC,HCOEF * DIAM / KT
*LIST,NUHC