downflow


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downflow

[′dau̇n‚flō]
(chemistry)
In an ion-exchange system, the direction of the flow of the solution being processed.
References in periodicals archive ?
Its products range from aseptic and containment isolators - designed to protect both the product and operators when handling pharmaceutical and biotech products - to downflow booths built to provide an airflow to keep potentially harmful powders away from an operator.
Only two sets of analyzable data could be found for vertical tubes, both for downflow. That of Moichizugi et al.
Capable of delivering OELs of <1 [micro]g/m3 this new Downflow Booth is ideal for applications where it needs to be positioned within 'quiet zones' or within multi-processing areas where acoustic interference would be a problem and when 'silent running' is more preferable.
The results in Figure 5 show that the fan in the upflow test system (Figure 5a) appears to behave somewhat similarly to the hypothetical fan in Figure 3a, and the fan in the downflow system (Figure 5b) behaved similarly to the fan in Figure 3b.
Bi, "Layer Inversion and Bed Contraction in Downflow Binary-Solid Liquid-Fluidized Beds," Can.
In optimized pond, influent wastewater is distributed at the bottom of the digestion pit and travels in an upflow mode through the sludge layer, in the anaerobic baffled pond, baffles are used to direct the flow of wastewater in an upflow and downflow mode through a series of sludge layer, thus the organic and inorganic materials in mixture of wastewater settled and sludge are converted biologically under anaerobic condition.
The main part of the device (combustion chamber) is an externally heated downflow tube with height 1 m and internal diameter 56 mm.
The [CO.sub.2] concentration was measured every 20 s at 0.6 m above soil surface and about 6-m downflow from the injection distribution system.
Available in 1.5 to seven tons of cooling capacity, the system can be configured for either upflow or downflow air discharge to meet specific applications.
Jane Memorial Lecture Award, presented 'Past, Present and Future of Distillation Technology'; Jesse Zhu, MCIC, took to the lecture podium as the recipient of the Syncrude Canada Innovation Award to present 'Expansion of the fluidization concept: upflow, downflow and counter flow'; and John McAndless, MCIC, of the Defence Research Establishment Suffield, Medicine Hat, AB, took over the Delta Club Lounge with his presentation 'Project Eraser: A Canadian Case Study on Chemical Warfare Materials Disposal'.
When this stream of falling air, or downflow, hits the ground, the wind fans out horizontally into an outflow.
Natividad, "4-chlorophenol oxidation photocatalyzed by a calcined Mg-Al-Zn layered double hydroxide in a co-current downflow bubble column," Industrial & Engineering Chemistry Research, vol.