Pulse Jet Mixing Tests With Noncohesive Solids

Meyer, Philip D.; Bamberger, Judith Ann; Enderlin, Carl W.; Fort, James A.; Wells, Beric E.; Sundaram, S.K.; Scott, Paul A.; Minette, Michael J.; Smith, Gary L.; Burns, Carolyn A.; Greenwood, Margaret S.; Morgen, Gerald P.; Baer, Ellen B. K.; Snyder, Stephen; White, Michael E.; Piepel, Gregory F.; Amidan, Brett G.; Heredia-Langner, Alejandro; Bailey, Sharon A.; Bower, John; Denslow, Kayte M.; Eakin, D.E.; Elmore, M.R.; Gauglitz, Phillip A.; Guzman, Anthony D.; Hatchell, Brian K.; Hopkins, Derek F.; Hurley, David E.; Johnson, Michael D.; Kirihara, Leslie J.; Lawler, Bruce D.; Loveland, Jesse S.; Mullen, O.D.; Pekour, Mikhail; Robinson, Peter; Russcher, Michael S.; Sande, Susan; Santoso, Christian; Shoemaker, Steven V.; Silva, Steve M.; Smith, Devin E.; Su, Yin‐Fong; Toth, James J.; Wiberg, John D.; Yu, Xiao‐Ying; Zuljevic, Nino

doi:10.2172/956900

Cited by 12 publications

(15 citation statements)

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“…Meyer et al (2009) conducted pulse jet mixing tests at three vessel scales (small -15-in.-diameter, mid -34-in.-diameter, and large -70-in.-diameter) with noncohesive solids to develop correlations to predict two measures of mixing performance in full-scale vessels: cloud height, H C , (the height to which solids will be lifted by the PJM action) and critical suspension velocity, U CS , (the minimum velocity needed to ensure that all solids are suspended off the floor, though not fully mixed). Prior to the scaled tests described in Meyer et al (2009), PNNL conducted tests to demonstrate the ability to mix in a small-scale PJM test facility (Johnson et al 2003), and scaling relationships were proposed by .…”

Section: Pnnl Pulse Jet Mixer Studiesmentioning

confidence: 99%

“…Pulse jet mixing test results with relatively mono-dispersed noncohesive solids were compared to other mono-and poly-dispersed solids test results in Meyer et al (2009). Results from these tests pertinent to the mixing of suspended particles are summarized.…”

Section: Wtp Pjm Testsmentioning

confidence: 99%

“…As reported in Meyer et al (2009), the PJM mixing tests with AZ-101/102 filtration simulant tests described in Bontha et al (2000) continue to be referenced frequently as PJM mixing tests with a broad distribution of settling solids. The simulant recipe was initially developed to physically represent the AZ-101/102 solids for cross-flow ultrafiltration equipment tests.…”

Section: Pjm Mixing Tests With Az-101/102 Filtration Simulantmentioning

confidence: 99%

“…The recipe is described in full in Golcar et al (2000), and the simulant PSDD is provided in Table 4.3. The vertical concentration profiles in the test vessel at prototypic nozzle velocities (8 m/s) are shown in Figure 4.17 for test Cases 1 through 6 from Meyer et al (2009). The data are presented as the measured UDS concentration normalized by the total mass fraction of UDS in the vessel as a function of the sample elevation height normalized by the simulant depth.…”

Section: Pjm Mixing Tests With Az-101/102 Filtration Simulantmentioning

confidence: 99%

“…The distinction between cohesive and non-cohesive materials is commonly used in the discussion of sediments and their behavior (Winterwerp and Van Kesteren 2004;Day 2006), even though it is recognized that it is difficult to give a sound scientific definition of a cohesive sediment (Winterwerp and Van Kesteren 2004). In tank mixing systems, slurries of non-cohesive or cohesive particles may behave differently depending on the particle characteristics and solids concentrations Meyer et al 2009). For sufficiently dilute systems, many slurries will behave as Newtonian fluids and cohesive interactions may be negligible ).…”

Section: Introductionmentioning

confidence: 99%

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The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

Gauglitz¹,

Wells²,

Bamberger³

et al. 2010

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Executive SummaryRadioactive waste that is currently stored in large underground tanks at the Hanford Site will be staged in selected double-shell tanks (DSTs) and then transferred to the Waste Treatment and Immobilization Plant (WTP). Before being transferred, the waste will be mixed, sampled, and characterized to determine if the waste composition meets the waste feed specifications. Washington River Protection Solutions (WRPS) is conducting a Tank Mixing and Sampling Demonstration Program to determine the mixing effectiveness of the current baseline mixing system that uses two jet mixer pumps to mobilize and mix waste in DSTs and to determine the adequacy of the planned sampling method. The overall purpose of the demonstration program is to mitigate the technical risk associated with the mixing and sampling systems meeting the feed certification requirements for transferring waste to the WTP.A critical aspect of meeting the feed certification requirements is ensuring that the collected samples will adequately represent the contents of the tank and that all batches of transferred waste are sufficiently uniform so that they all are equivalent to the characterized samples. However, the tank waste contains slurries of solid particles that settle and may become progressively more concentrated towards the bottom of the tank. Obtaining a perfectly uniform distribution of waste in the DSTs with a mixing system may not be possible. To determine how close this ideal can be approached, the expected performance of the DST mixing and sampling systems must be quantified. There have been a number of laboratory studies and full-scale tank farm studies that evaluated mixing behavior; these studies are discussed later in this report. However, these studies do not provide adequate quantitative information to evaluate the performance of the planned sampling and the batch uniformity. Accordingly, WRPS' demonstration program is focusing specifically on quantifying the uniformity of samples and batch transferred material to reduce the technical risk associated with these systems.The first phase of the demonstration program is to conduct scaled tests that appropriately match fullscale behavior and to evaluate sampling methodologies and the uniformity of batch transfers. The initial scaled testing will use non-cohesive particles where the particles do not have cohesive interactions that would cause the particles to stick together. The purpose of this report is to analyze existing data and evaluate whether scaled mixing tests with cohesive simulants are needed to meet the overall objectives of the small-scale mixing demonstration program. This evaluation will focus on estimating the role of cohesive particle interactions on various physical phenomena that occur in parts of the mixing process. A specific focus of the evaluation will be on the uniformity of suspended solids in the mixed region.The evaluation shows that cohesive particle interaction will have multiple effects through a number of different mechanisms. Some of the effects ...

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Section: Pnnl Pulse Jet Mixer Studiesmentioning

confidence: 99%

Section: Wtp Pjm Testsmentioning

confidence: 99%