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Accelerating Turbulent Flow in an Elbow Duct using Coupled 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 coupled implicit solver in FLUENT 5 is used to solve this flow.

Number of cells
32,000
Cell type
hexahedral
Models
k-epsilon turbulence
Solver
coupled 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 FL5S2 RATINGS
FLUENT Version CPUs or Cores Machines or Blocks Rating Speedup Efficiency
DELL POWEREDGE_1750 (XEON,3060,LINUX,MYRINET_D) 6.1 serial 1 1664.1 N/A N/A
1 1 1711.6 1.0 100%
2 2 3423.1 2.0 100%
4 4 5714.3 3.3 83%
8 8 9458.1 5.5 69%
16 16 14026.0 8.2 51%
32 32 14606.9 8.5 27%
64 32 7769.8 4.5 7%
DELL POWEREDGE_2650 (XEON,2400,WIN2K,GBIT) 6.1 serial 1 1489.7 N/A N/A
1 1 1528.7 1.0 100%
2 1 2526.3 1.7 83%
4 2 3299.0 2.2 54%
8 4 3237.8 2.1 26%
16 8 3120.8 2.0 13%
32 16 2169.2 1.4 4%
HP C8000 (PA8800,900,HPUX) 6.1 serial 1 1245.7 N/A N/A
1 1 1259.5 1.0 100%
2 1 2424.2 1.9 96%
HP RX2600 (ITANIUM2,1500,HPUX,GBIT) 6.1 serial 1 1474.4 N/A N/A
1 1 1502.1 1.0 100%
2 2 2887.7 1.9 96%
2 1 2995.8 2.0 100%
4 4 5413.5 3.6 90%
4 2 5699.2 3.8 95%
8 8 5835.9 3.9 49%
8 4 6421.4 4.3 53%
16 16 4665.2 3.1 19%
16 8 4909.1 3.3 20%
32 16 432.4 0.3 1%
HP RX5670 (ITANIUM2,1500,LINUX) 6.1 serial 1 2105.3 N/A N/A
1 1 2147.1 1.0 100%
2 1 4337.3 2.0 101%
4 1 8372.1 3.9 97%
IBM PSERIES_570 (POWER5,1900,AIX53) 6.1 serial 1 2758.6 N/A N/A
1 1 2938.8 1.0 100%
2 1 5714.3 1.9 97%
4 1 10800.0 3.7 92%
8 1 15238.1 5.2 65%
16 1 25714.3 8.7 55%
IBM PSERIES_570 (POWER5,1900_SMT,AIX53) 6.1 1 1 3864.0 N/A N/A
2 1 7200.0 N/A N/A
4 1 10378.4 N/A N/A
8 1 17759.5 N/A N/A
IBM PSERIES_655 (POWER4,1700,AIX52,FEDERATION_SWITCH) 6.1 serial 1 2307.7 N/A N/A
1 1 2468.6 1.0 100%
2 1 4768.2 1.9 97%
4 1 9037.7 3.7 92%
8 2 12800.0 5.2 65%
16 4 18782.6 7.6 48%
IBM XSERIES_335 (XEON,2800_533FSB,LINUX,GBIT) 6.1 serial 1 1437.1 N/A N/A
1 1 1602.4 1.0 100%
2 2 2950.8 1.8 92%
4 4 4475.5 2.8 70%
8 8 5013.1 3.1 39%
16 8 5744.7 3.6 22%
IBM XSERIES_335 (XEON,2800_533FSB,LINUX,MYRINET) 6.1 1 1 1597.6 1.0 100%
2 2 3171.8 2.0 99%
4 4 5333.3 3.3 83%
8 8 8648.6 5.4 68%
16 8 12203.4 7.6 48%
IBM XSERIES_335 (XEON,3060_533FSB,LINUX,MYRINET) 6.1 serial 1 1669.2 N/A N/A
1 1 1722.5 1.0 100%
2 2 3385.6 2.0 98%
4 4 5714.3 3.3 83%
8 8 9505.0 5.5 69%
16 16 13935.5 8.1 51%
LINUX_NETWORX EVOLOCITY (XEON,3060,LINUX,MYRINET_D) 6.1 8 4 8347.8 N/A N/A
16 8 12413.8 N/A N/A
32 16 12790.5 N/A N/A
64 32 7714.3 N/A N/A
128 64 3256.7 N/A N/A
SUN JAVA_WS_W1100Z (OPTERON,2400,LINUX) 6.1 serial 1 2093.0 N/A N/A
1 1 2126.0 1.0 100%
SUN JAVA_WS_W2100Z (OPTERON,2400,LINUX) 6.1 serial 1 2080.9 N/A N/A
1 1 2070.9 1.0 100%
2 1 4067.8 2.0 98%
SUN V20Z (OPTERON,2400,LINUX) 6.1 serial 1 2192.9 N/A N/A
1 1 2063.0 1.0 100%
2 1 4399.2 2.1 107%
SUN V65X (XEON,3060,LINUX,MYRINET) 6.1 serial 1 1669.2 N/A N/A
1 1 1703.5 1.0 100%
2 2 3380.3 2.0 99%
4 4 5614.0 3.3 82%
8 8 8972.0 5.3 66%
16 16 12705.9 7.5 47%
SUN V65X (XEON,3200,LINUX) 6.1 serial 1 1725.2 N/A N/A
1 1 1767.6 1.0 100%
2 1 2283.3 1.3 65%