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Accelerating Turbulent Flow in an Elbow Duct using Segregated Implicit Solver
 

Flow is accelerated through a 90 degree elbow duct with a rectangular cross section. The geometry and flow have a symmetry plane permitting the modeling of only half the domain. Because of the curvature of the duct, significant secondary flow occurs, with velocity components normal to the principal flow direction. The segregated implicit solver in FLUENT 5 is used to solve this flow.

Number of cells
32,000
Cell type
hexahedral
Models
k-epsilon turbulence
Solver
segregated implicit

Plots

Serial
Parallel

Results

In the table below, a rating listed in red corresponds to the redzone result, and one in bold is a peak result. Bold red is used to indicate that the run was both the peak and redzone result.

Results are listed alphabetically by platform, within each FLUENT version.

 

Platform FL5S1 RATINGS
FLUENT Version CPUs or Cores Machines or Blocks Rating Speedup Efficiency
APPRO XTREMESERVER (OPTERON_880,2400,SLES10) 6.2 serial 1 2356.8 N/A N/A
1 1 2365.2 1.0 100%
2 1 4615.4 2.0 98%
4 1 7710.8 3.3 82%
8 1 10491.8 4.4 55%
DELL 670 (EM64T,3600,RHEL3) 6.2 serial 1 2268.3 N/A N/A
1 1 2215.4 1.0 100%
2 1 3692.3 1.7 83%
DELL POWEREDGE_1855 (EM64T,3600,WIN2003,GBIT_FORCE10) 6.2 1 1 1909.8 1.0 100%
2 1 2967.0 1.6 78%
4 2 3932.6 2.1 51%
8 4 3404.3 1.8 22%
16 8 2425.6 1.3 8%
32 16 2200.7 1.2 4%
HP DL360 (EM64T,3400,RHEL3,IB_VOLTAIRE) 6.2 serial 1 2083.4 N/A N/A
1 1 2130.2 1.0 100%
2 1 3797.8 1.8 89%
4 2 7146.4 3.4 84%
8 4 11034.5 5.2 65%
16 8 13292.3 6.2 39%
32 16 12083.9 5.7 18%
HP DL360 (EM64T,3400,RHEL3,GIGE) 6.2 2 1 3692.3 N/A N/A
4 2 5492.7 N/A N/A
8 4 6213.6 N/A N/A
16 8 3257.9 N/A N/A
32 16 1524.3 N/A N/A
HP DL585 (OPTERON,2400,RHEL3,IB_VOLTAIRE) 6.2 serial 1 2026.3 N/A N/A
1 1 2123.4 1.0 100%
2 1 4206.4 2.0 99%
4 1 7710.8 3.6 91%
8 2 11636.4 5.5 69%
16 4 13846.2 6.5 41%
32 8 11458.9 5.4 17%
HP XC4000 (OPTERON,2400,LINUX,IB_VOLTAIRE) 6.2 serial 1 2130.2 N/A N/A
1 1 2208.0 1.0 100%
2 1 4260.4 1.9 96%
4 2 7912.1 3.6 90%
8 4 12075.5 5.5 68%
16 8 11264.7 5.1 32%
HP XC4000 (OPTERON,2400,LINUX,GIGE) 6.2 1 1 2208.0 1.0 100%
2 1 3979.7 1.8 90%
4 2 6390.5 2.9 72%
8 4 7529.4 3.4 43%
16 8 1781.8 0.8 5%
IBM E326 (OPTERON,2400,SLES9,IB_TOPSPIN) 6.2 serial 1 2260.6 N/A N/A
1 1 2200.7 1.0 100%
2 1 4490.6 2.0 102%
4 2 8205.1 3.7 93%
8 4 12549.0 5.7 71%
16 8 14448.2 6.6 41%
32 16 12307.7 5.6 17%
IBM E326 (OPTERON,2400,SLES9,MYRINET) 6.2 1 1 2186.2 1.0 100%
2 1 4521.2 2.1 103%
4 2 8205.1 3.8 94%
8 4 11428.6 5.2 65%
16 8 12539.9 5.7 36%
32 16 10384.6 4.8 15%
IBM LS20 (OPTERON,2600,RHEL3,MYRINET) 6.2 1 1 2517.5 1.0 100%
2 1 5112.4 2.0 102%
4 2 8981.3 3.6 89%
8 4 12307.7 4.9 61%
16 8 12307.7 4.9 31%
32 16 10224.9 4.1 13%
64 32 8007.4 3.2 5%
IBM LS20 (OPTERON_2CORE,2200,SLES9,MYRINET) 6.2 serial 1 2150.9 N/A N/A
1 1 2215.4 1.0 100%
2 1 4206.4 1.9 95%
4 1 7619.0 3.4 86%
8 2 11636.4 5.3 66%
16 4 11264.7 5.1 32%
32 8 8981.3 4.1 13%
48 12 7303.5 3.3 7%
IBM X336 (EM64T,3600,RHEL3,IB_TOPSPIN) 6.2 serial 1 2222.8 N/A N/A
1 1 2252.9 1.0 100%
2 1 4052.5 1.8 90%
4 2 7728.1 3.4 86%
8 4 12075.5 5.4 67%
16 8 15104.9 6.7 42%
32 16 12539.9 5.6 17%
IBM X336 (EM64T,3600,RHEL3,MYRINET) 6.2 1 1 2252.9 1.0 100%
2 1 4128.0 1.8 92%
4 2 7728.1 3.4 86%
8 4 11428.6 5.1 63%
16 8 12781.1 5.7 35%
32 16 11076.9 4.9 15%
INTEL S5000XAL (EM64T_2CORE_WOODCREST,3000,LINUX) 6.2 serial 1 3651.7 N/A N/A
1 1 3671.9 1.0 100%
2 1 6515.8 1.8 89%
4 1 10322.6 2.8 70%
SGI ALTIX_3000 (ITANIUM2,1600,RHEL3_PROPACK3) 6.2 serial 1 1574.9 N/A N/A
1 1 1593.8 1.0 100%
2 1 3242.0 2.0 102%
4 1 5881.6 3.7 92%
8 1 8888.9 5.6 70%
16 1 11428.6 7.2 45%
32 1 9697.0 6.1 19%
SUN BLADE8400 (OPTERON_885,2600,SLES9,IB_VOLTAIRE) 6.2 serial 1 2508.0 N/A N/A
1 1 2470.7 1.0 100%
2 2 4886.9 2.0 99%
4 4 9230.8 3.7 93%
8 4 13617.0 5.5 69%
16 4 14769.2 6.0 37%
32 4 9773.8 4.0 12%
SUN X2100 (OPTERON_156,3000,SLES9,IB_VOLTAIRE) 6.2 serial 1 2792.5 N/A N/A
1 1 2953.8 1.0 100%
2 2 5729.4 1.9 97%
4 4 10549.5 3.6 89%
8 8 15609.8 5.3 66%
16 16 20139.9 6.8 43%
32 32 17041.4 5.8 18%