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Coal Combustion in a Boiler

 

This application couples a continuous gas phase calculation with a discrete phase (particle) calculation. 500 coal particles are injected into an industrial boiler where their trajectories are computed using a Lagrangian formulation that includes dispersed phase inertia, hydrodynamic drag and the force of gravity. Each particle injection is subject to heating/cooling, vaporization, boiling and solid combustion. During the injection calculations, momentum, heat and mass exchanges are calculated and stored as source terms which are then used in the subsequent gas phase calculation. Furthermore, stochastic modeling of particle tracks, requiring a fixed number of "tries" per particle, are used to account for local turbulent fluctuations. In this calculation, 10 stochastic tries per particle are used, resulting in a total of 5000 particle tracks per discrete phase update. There are 10 continuous phase iterations per discrete phase update.

Number of cells
155,188
Cell type
tetrahedral
Models
k-epsilon turbulence
6 species with reaction
dispersed phase
P1 radiation
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 FL5M1 RATINGS
FLUENT Version CPUs or Cores Machines or Blocks Rating Speedup Efficiency
HP RX1620 (IA64,1600,LINUX,GIGE) 6.2 2 1 715.2 N/A N/A
4 2 1110.9 N/A N/A
8 4 1728.9 N/A N/A
16 8 2034.1 N/A N/A
32 16 1739.3 N/A N/A
64 32 1213.5 N/A N/A
HP RX1620 (IA64,1600,LINUX,IB) 6.2 serial 1 398.9 N/A N/A
1 1 401.9 1.0 100%
2 1 715.8 1.8 89%
4 2 1206.3 3.0 75%
8 4 2218.2 5.5 69%
16 8 3573.9 8.9 56%
32 16 5325.1 13.2 41%
64 32 6249.5 15.5 24%
IBM LS20 (OPTERON_2CORE,2400,LINUX,IB_VOLTAIRE) 6.2 serial 1 506.9 N/A N/A
1 1 548.6 1.0 100%
2 1 1024.6 1.9 93%
4 1 1700.8 3.1 78%
8 2 3156.2 5.8 72%
16 4 4979.8 9.1 57%
32 8 7170.1 13.1 41%
64 16 8189.6 14.9 23%
IBM P575+ (POWER5,2200,AIX53,FEDERATION_SWITCH) 6.2 serial 1 518.8 N/A N/A
1 1 513.2 1.0 100%
2 1 935.6 1.8 91%
4 1 1568.8 3.1 76%
8 1 2769.2 5.4 67%
16 2 4189.1 8.2 51%
32 4 6063.2 11.8 37%
64 8 8074.8 15.7 25%