1/5 TURBULENT TRANSPORT IN AN AXIALLY ROTATING PIPE (i)

BY : CHAM - M R Malin

DETAILS :

• Fully-developed flow and heat transfer in an axially rotating pipe.
• The swirl is driven by the pipe wall rotating around the pipe axis.
• Reynolds no Re=5E4 Prandtl no = 0.71 Swirl no = 0.5
• Constant wall heat flux applied at the pipe wall.
• Turbulence represented via RSTM with various pressure-strain models:
  • the ipm, ipy, ipc and qim models plus wall-reflection which are linear in Reynolds stresses; and
  • the ssg model which requires no wall-reflection model and is quadratic in Reynolds stresses.

• Calculation performed with single-slab solver and 50 mesh cells.
• Calculations based on PHOENICS LIBRARY CASE T605.

2/5 TURBULENT TRANSPORT IN AN AXIALLY ROTATING PIPE (ii)

MAIN RESULTS:

Table 1: Friction factor f versus Re and N

                   Re=1.E4         Re=2.E4       Re=5.E4
                 DATA  RSTM      DATA  RSTM    DATA   RSTM
   N = 0          30    34        52    56      103   109
   N = 0.5        24    27        44    45       87    90
          Table 2: Nusselt number Nu versus Re and N

• RSTM and KE-EP model produce essentially same Nu and f results for N=0.
• KE-EP model produces identical results for both values of N.
• All RSTM pressure-strain models produce essentially same Nu and f results.

3/5 ROTATING PIPE FLOW: Axial-velocity profiles.
4/5 ROTATING PIPE FLOW: Swirl-velocity profiles.
5/5 ROTATING PIPE FLOW: Turbulent shear-stress profiles.