Parallel flow paths

If the calculated value of the Reynolds number is below 2,000, the flow will generally be laminar, that is, the fluid particles will follow parallel flow paths. For laminar flow the friction factor is... 

Effective control of the flow of slurry mixture to a large number of parallel flow paths. (Currently,... 

During Demo II and EDS II testing, only a 3-cell system was operated, which is much simpler than a full-scale 432-cell flow system with all cells in a parallel flow path and fluids containing significant levels of suspended solids. 

The slurry flow management scheme to the cells has large numbers of parallel flow paths through the hydrocyclones and through individual electrode cavities. Upsets in these paths can lead to upsets in the quality and quantity of slurry flowing to the electrode cavities, with possible impact on membrane operation. 

Effective control of the flow of slurry mixture to a large number of parallel flow paths. (Currently, flow control has been demonstrated on only three parallel paths, whereas the full-scale application would have up to 432 parallel flow paths in the catholyte feed circuit.)... 

Figure 15.5 Parallel-flow path using a four-filament bridge. Filaments 1 and 3 are D2,2 and 4 are Dj dotted lines are gas-flow paths.

The issue of flow maldistribution (unequal flows through the parallel flow paths) can be important in some reactors. 

Each of the membrane devices may be assembled by connecting the modules into combinations of series, parallel-flow paths, or both. These assemblies are connected to pumps, valves, tanks, heat exchangers, instrumentation, and controls to provide complete systems. 

The Jewell-Johnson design provided parallel flow paths for upward... 

Parallel flow paths of this type are even less wise in a situation where a relatively small downward temperature excursion causes waxes to form and creates danger that deposits of waxy catalyst will block some tubes entirely. Until the mid-1970s, Sasol s operations were plagued by involuntary shutdowns (Mclver, personal communication, 1972) for clearing blocked tubes with jets of high pressure water or more severe mechanical means (Shingles and McDonald, 1988). 

Reactant gas enters through the inlet port of the gas feeder, takes multiple parallel flow paths through the channels, and exits through the outlet port. One major advantage of this design is the lower pressure drop because of the parallel nature of the flow. However, the gas distribution through the... 

Parallel flow paths everywhere in the systems are not accounted for. 

The TRACE reactor model (Figure 12-5) includes thermal-hydraulic representations of the reactor vessel inlet nozzle, inlet flow downcomer, inlet plenum, fuel pin lower extension (6), active fuel region (6), fuel pin gas plenum and upper extension (6), outlet plenum and outlet nozzle. The TRACE hydraulic core model Includes six parallel flow paths, each representing one ring of fuel pins, as... 

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