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Relevant bibliographies by topics / Retention flow

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Academic literature on the topic 'Retention flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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Journal articles on the topic "Retention flow"

1

Filho, Luiz G. Freitas, Felipe Nasser, José Carlos Ingrund, Marcelo Calil Burihan, George Dias Brandão, and Luiz J. Budib. "High-flow priapism and urinary retention." Urology Case Reports 19 (July 2018): 48–49. http://dx.doi.org/10.1016/j.eucr.2018.05.006.

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D'Angelo, M. V., E. Fontana, R. Chertcoff, and M. Rosen. "Retention phenomena in non-Newtonian fluids flow." Physica A: Statistical Mechanics and its Applications 327, no. 1-2 (2003): 44–48. http://dx.doi.org/10.1016/s0378-4371(03)00436-9.

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Kirkland, J. J., L. S. Boone, and W. W. Yau. "Retention effects in thermal field-flow fractionation." Journal of Chromatography A 517 (September 1990): 377–93. http://dx.doi.org/10.1016/s0021-9673(01)95735-8.

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Moon, Myeong Hee, P. Stephen Williams, and Hansun Kwon. "Retention and Efficiency in Frit-Inlet Asymmetrical Flow Field-Flow Fractionation." Analytical Chemistry 71, no. 14 (1999): 2657–66. http://dx.doi.org/10.1021/ac990040p.

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Williams, P. Stephen. "Retention ratio and nonequilibrium bandspreading in asymmetrical flow field-flow fractionation." Analytical and Bioanalytical Chemistry 407, no. 15 (2015): 4327–38. http://dx.doi.org/10.1007/s00216-015-8734-y.

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Adámek, Karel, Jan Kolář, and Pavel Peukert. "Vortex Valve – Principle, Design and Application." IRA-International Journal of Applied Sciences (ISSN 2455-4499) 11, no. 2 (2018): 9. http://dx.doi.org/10.21013/jas.v11.n2.p1.

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The paper contains the overview of so-called vortex valve, used as outlet device on retention reservoirs for retention of rainstorms and later slow outflow into drainage etc. Simple one-dimensional equations are well known, but for complex three-dimensional flow fields inside the valve the method of flow numerical simulation is used. Particular paragraphs contain the theory of flow fields inside, explanation of branched flow characteristic, separated by transitional area, basics of designing and influence of both inlet/outlet opening sizes on the form of characteristic, valve adaptation for high flows at low water levels etc. Results are used for designing of new model series of valves for various water flows and levels.

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Little, S. E., J. M. Link, K. A. Krohn, and J. B. Bassingthwaighte. "Myocardial extraction and retention of 2-iododesmethylimipramine: a novel flow marker." American Journal of Physiology-Heart and Circulatory Physiology 250, no. 6 (1986): H1060—H1070. http://dx.doi.org/10.1152/ajpheart.1986.250.6.h1060.

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An ideal deposition marker for measuring regional flow is completely extracted during transcapillary passage and permanently retained. beta-Labeled desmethylimipramine ([3H]DMI) is a nearly ideal flow marker. To obtain gamma- and positron-emitting markers, DMI was iodinated to form 2-iododesmethylimipramine (IDMI). IDMI was more lipophilic than DMI. In isolated saline-perfused rabbit hearts its transorgan extraction was greater than 99%; and retention was greater than 98% at 5 min at mean flows of up to 3.5 ml X g-1 X min-1. During washout, the fractional escape rate was less than 0.1% X min-1 and was independent of flow. In isolated blood-perfused rabbit hearts, extraction was still 98%, but retention was as low as 86% after 5 min at a flow of 1.6 ml X g-1 X min-1. The fractional escape rate was up to 2% X min-1 but independent of flow. Despite this relatively rapid loss, regional IDMI deposition remains proportional to regional flow for many minutes. Therefore IDMI is useful as an externally detectable "molecular microsphere" for myocardial flow imaging in vivo.

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Adámek, Karel, Jan Kolář, and Pavel Peukert. "Vortex valve." EPJ Web of Conferences 180 (2018): 02001. http://dx.doi.org/10.1051/epjconf/201818002001.

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The paper deals with a flow field inside the so-called vortex valve, used as an outlet device on retention reservoirs for retention of rainstorms and later slow outflow into sewerage etc. The system is very simple, without moving parts. Using the method of numerical flow simulation, the unusual flow characteristic Δp = f(Q), containing two branches, is explained. Further, there it is studied influence of both inlet/outlet opening sizes on the form of the characteristic. Results can be used for designing the new model series of valves for various flows.

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Lazaro, F., M. D. Luque de castro, and M. Valcárcel. "Integrated retention/spectrophotometric detection in flow-injection analysis." Analytica Chimica Acta 219 (1989): 231–38. http://dx.doi.org/10.1016/s0003-2670(00)80354-2.

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Canales, Benjamin K., Kari Hendlin, Matthew Braasch, et al. "Percutaneous nephrostomy catheters: Drainage flow and retention strength." Urology 66, no. 2 (2005): 261–65. http://dx.doi.org/10.1016/j.urology.2005.03.030.

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Dissertations / Theses on the topic "Retention flow"

1

Svedberg, Anna. "Improvement of the retention-fromation relationship using three-component retention aid systems." Doctoral thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96259.

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Al-Hashmi, Abdul-Aziz Rashid Mohammed. "Polymer retention during flow of polymer solutions through porous media." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/1372.

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Polymer solution flow and retention through porous media is of interest to many applications in the oil industry such as drilling, water shut-off and enhanced oil recovery. Operators of mature oil and gas fields are faced with the problem of excessive water production (EWP), which can cause a premature abandonment of some oil and gas wells. It has been found that the injection of high molecular weight polymer solutions through the pay zones of the oil and gas wells would induce a sharp decrease of the water production without affecting the oil and gas production. This effect is called disproportionate permeability reduction (DPR) and the polymer solutions inducing such an effect are called relative permeability modifiers (RPM). Hence, the DPR effect has been utilized in the water shut-off or conformance control of oil and gas wells suffering from EWP. In spite of the extensive research of the DPR effect, there is still a lack of agreement on the mechanisms controlling such an effect and relatively high percentage failures are observed during conformance control field applications. Polymer retention in porous media has been attributed to mechanisms such as bridging-adsorption, adsorption-entanglement, and flow-induced adsorption. These mechanisms have been proposed to account for the increase in flow resistance during or after the flow of polymer solutions through porous media. The DPR effect has been attributed to effects induced by this retained polymer such as steric and lubrication effects, wettability change, segregated oil and water pathways, and swelling and shrinking of the adsorbed polymer layer. The aim of this study is to add knowledge on the effect of polymer solution flow on polymer retention in porous media. In this study, the rheology of high molecular weight polymer solutions was studied using a cone-and-plate setup. Moreover, the characteristics and the effective hydrodynamic thickness of adsorbed polymer layers on glass from these polymer solutions under static conditions were investigated using atomic force microscopy (AFM). Also, quartz crystal microbalance with the dissipation monitoring (QCM-D) was used to investigate the effect of increasing the flow rate of polymer solutions on the adsorbed amount on silica and gold surfaces. Additionally, the mobility reduction and the residual resistance as a result of polymer solution flow through single glass capillaries, 2D and 3D models of porous media were studied. The implementation of the above techniques was used to relate the microscopic effect of the flow of the polymer solutions to the polymer retention in the porous media. The anti-thixotropic behaviour of the polymer solutions, which can be attributed to the shearinduced formation of micron-size transient entanglement networks (TEN), is expected to play a major role in the polymer retention in porous media. These microscopic structures can adsorb on the solid surfaces if the adsorption energy of the polymer/solid system is sufficient. Also, in porous media in which mechanical entrapment is possible, these structures can be entrapped in the small pores and pore throats. Two new mechanisms for polymer retention are proposed in this study: transient-entanglement networks adsorption (TENA) and transient-entanglement networks entrapment (TENE). The TENA is the retention mechanism of the TEN structures in flow systems in which mechanical entrapment is not possible provided that the adsorption energy is sufficient. If mechanical entrapment is possible, then the retention by adsorption and mechanical entrapment are lumped in the TENE mechanism. The results from this study have given a new insight on the flow and retention of polymer solutions through porous media. Hence, it is believed that the improved understanding will improve the design of high molecular

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Srikongsri, Atitep. "A laboratory permeameter study of geotextile-soil retention in cyclic flow." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/25029.

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In the absence of an extensive body of laboratory and field data, empirical criteria for soil retention in dynamic or cyclic flow are not yet well-defined with reference to a margin of safety. A performance-based approach is taken in this study: the method of investigation involves laboratory tests on a total of seven geotextiles (needle-punched nonwoven and woven materials) and a total of four uniformly-graded soils (non-plastic fine sand and coarse silt). Filtration compatibility in unidirectional and cyclic flow reversal is evaluated using two rigid-wall permeameters: a small bench-mounted device, and a large floor-mounted device. Analysis of the results addresses the effects of specimen size (small and large), sidewall friction and stress distribution, and examines the influence of filter ratio (AOS/Dn), hydraulic gradient (i) and confining stress (σʹ) over a range of cyclic flow reversal times or wave period (T). A novel analytical framework is proposed from the permeameter test results, to unify AOS/Dn and a hydromechanical index that accounts for the combined effect of hydraulic gradient and confining stress. The framework provides a distinction between the benign actions of mass loss through the geotextile by washout, in contrast to the more problematic action of piping. A filter ratio AOS/D₈₅ appears better-suited to interpretation of the data than AOS/D₅₀. The framework is used to examine the margin of safety inherent in current design guidance. Independent verification of the framework through comparison with other laboratory studies, and a consideration of field observations reported by others, leads to a recommendation that AOS/D₈₅ ≤ 1 to address undue conservatism in design guidance.

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Zardava, Kiriaki. "Moisture retention and near saturated flow in Mechanically Biologically Treated (MBT) waste." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348825/.

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The aim of this research is to understand the interactions between liquid and gas flow at high degrees of saturation, as this could have a significant effect on the effectiveness of landfill remediation by flushing. Particular attention is paid to two key parametric functions that are believed to control the simultaneous flow of leachate and gas in waste materials. These are the relationship between capillary pressure or suction and the degree of leachate saturation or volumetric moisture content, known as the moisture retention characteristic; and the relationship between unsaturated hydraulic conductivity and moisture content. The thesis starts with a review of previous work on moisture retention characteristic curves and relative permeability functions for waste materials. New data from a drainage column experiment, pressure plate apparatus and hanging water column tests on mechanically and biologically treated (MBT) waste specimens are then presented and compared. The results from the drainage experiments have been interpreted using the unsaturated flow model HYDRUS-1D (Šimůnek et al., 2005) and the University of Southampton Landfill Degradation and Transport model LDAT (White et. al 2004). These results give support to the modelling concepts and the integrity of the code for both models and highlight the capabilities of single and dual porosity models. Use of the van Genuchten (1980) type curves to represent the moisture retention characteristics was found to be fruitful. The values of the parameters that control the shapes of these curves, and therefore the shape of the relationships between capillary pressure and moisture content and unsaturated hydraulic conductivity and moisture content, are reviewed using both results from the literature and results from the experimental work described in the thesis. The sensitivity of the shapes to the values of the parameters is examined as is the sensitivity of the results of numerical modelling that is based on the parameter values. The relationship of the parameter values to the material dry density is also explored. Whilst the flow in the gas phase is not central to the subject of the thesis, it has been possible to make observations on the relationship between unsaturated gas permeability and moisture content. The thesis draws attention to the fact that different experimental techniques can lead to significantly different estimates of the moisture retention characteristics. Hanging column tests show an apparently sensible variation of moisture retention curve with density and are self-consistent. However a partial or full interruption of the liquid phase within the specimen, or between the specimen and the hanging column porous plate will inhibit the drainage of liquid from the specimen, resulting in an increase in the retained moisture content at a given applied external suction. This has significant implications for the study of liquid movement in unsaturated wastes. A key recommendation from the work is that the moisture retention characteristic curve for a waste is perhaps better determined from direct measurements of suction and moisture content, as in the drainage column apparatus for the suction range 0-10 kPa. For higher suctions carefully set up pressure plate tests are advisable.

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Klute, Robert Cragg. "Enantiomeric separations by HPLC:temperature, mobile phase, flow rate and retention mechanism studies." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/38458.

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The effects of changes in temperature, mobile phase composition, flow rate, and stationary phase upon the enantiomeric separation of several racemic mixtures are investigated. The changes in capacity factor (k'), selectivity (α), and efficiency (N) and enantiomeric resolution (R), are explored. Resolution is then shown to be controlled by the specific combination of chiral stationary phase (CSP), solute, mobile phase and temperature. The key to optimizing chiral resolution lies in understanding the retention mechanism(s) for a given CSP. The proposed retention mechanisms for the two CSP used in the optimization studies are evaluated using chromatographic/thermodynamic data. Inferences are made which support the well-characterized "Pirkle"-type R-dinitrobenzoylphenylglycine retention mechanism, which depends solely on attractive-repulsive interactions to establish two diasteriomeric complexes having unequal internal energy, and therefore eluting at different times from the chromatographic system. For comparison, a more complicated CSP composed of a tris cellulose(3,5- dimethylphenylcarbamate) coated to a silica gel support is also examined. For this CSP the proposed mechanisms, which include both attractive-repulsive interactions and inclusion complex types, are evaluated according to the chromatographic optimization data, and compared to similar data for the single-mechanism "Pirkle" CSP. In contrast to the above"macromolecular"-level inferences about retention mechanisms drawn from chromatographic data, a second study was initiated using a model CSP attached to a l000-Å gold surface, with Fourier-Transform Infrared Spectrometry in a Reflectance-Absorbance mode, to probe the specific molecular interactions which make possible the diasteriomeric complex. This <i>in situ</i> experiment, in contrast to previous <i>ex situ</i>, stationary phase work, is designed to show that hydrogen bonding is, as predicted, a principal force holding the complexes together, and that a measurable difference exists between the weaker R-trifluoroanthrylethanol (TFAE) and the stronger S-TFAE complexes due to their different stereo-geometry. A further experiment to characterize the difference in mechanisms between the "Pirkle" and cellulose CSPs involves relating their chromatographic retention behavior to their structure, known as Qualitative Structure Retention Relationships (QSRR). Some structure-specific physical-organic chemistry parameters are determined using an EPA-developed computer program and correlations are made between retention on a given CSP and some of the parameters.<br>Ph. D.

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Goulet, Richard Roger. "Mechanisms affecting metal retention by surface-flow wetlands in cold temperate climates." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/9210.

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The mechanisms affecting metal retention by surface-flow wetlands were investigated by relating variations in metal retention to variables such as hydraulic residence time, temperature (i.e. seasonal effects), phytoplankton biomass, photosynthesis and the presence of emergent vegetation. The importance of hydraulic residence time was investigated at the Monahan surface-flow wetland in Kanata, Ontario. This wetland retained metals best during summer and fall whereas during winter, the metal retention was significantly lower. The first-order removal model predicted Fe and Mn retention in the spring and Zn retention from spring to fall in both years of the study. Hydraulic residence times, greater than 7 days, provided the maximum retention of Fe, Mn, and Zn. However, first-order removal models failed to fit summer, fall and winter data for almost every metal under investigation (Fe, Mn, Cu, As) suggesting that hydraulic residence time (<1--25 days) do not regulate metal retention during these seasons. The Monahan wetland also affected the partitioning of metals between particulate and dissolved phases thus potentially affecting the bioavailability of metals to downstream systems. On a yearly basis, the wetland showed significant retention of the dissolved phase, but the retention of total Fe and Mn was poor. The wetland transformed dissolved into particulate metals from spring to fall whereas during the winter, dissolved metals were released. Changes in pH, alkalinity and temperature could explain 11% and 40% of the variation in the ratio of dissolved to total Fe and Mn respectively. Furthermore, from spring to late summer, planktonic algal biomass was negatively related to the ratio of dissolved to total Fe and Mn, which suggests the importance of phytoplankton in affecting the partitioning of metal in young plankton-dominated wetlands. In the Monahan wetland and in an acid mine drainage wetland (Falconbridge) near Sudbury, Ontario, diel changes in metal concentrations followed diel changes in pH and oxygen induced by photosynthesis. During the day, metal concentrations in the water column were low because high pH and oxygen favored the precipitation of Fe and Mn oxides at the sediment-water interface. At night, Fe and Mn oxides were reduced and released to the water column because intense biological respiration decreased oxygen and pH. Diel changes in metal concentrations have to be considered when evaluating the retention performance by surface-flow wetlands. Finally, the effect of emergent vegetation on the concentration and partitioning of metals in surface sediments of four wetlands was investigated. (Abstract shortened by UMI.)

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Klute, Robert Cragg. "Enantiomeric separations by HPLC : temperature, mobile phase, flow rate and retention mechanism studies /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-171241/.

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Smith, Jennifer Claire. "Particle Retention in Suspension-Feeding Fish: Kinematics, Oral Flow Speed, and Particle Retention during Tilapia Suspension Feeding with Gill Rakers Intact vs Removed." W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539626848.

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Waterhouse, Sara. "The retention testing of sterilising grade membranes with Pseudomonas diminuta." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/13738.

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Membranes with a pore size rating of 0.2μm are recommended for the sterilisation of liquids by filtration and are validated for this purpose by a retention test with Pseudomonas diminuta. Practices for retention testing were found to vary among the membrane manufacturers and only one type of commercial 0.2μm rated membrane was found to reliably retain P. diminuta. The retention for P. diminuta given by experimental grafted membranes was studied and was sometimes higher than that given by non-grafted membranes due to obstruction of the pores by graft material. The dimensions for individual cells of P. diminuta was studied by scanning electron microscopy and a rapid electronic method. Bacteria of larger dimensions than the pore size rating of experimental membranes were found in test permeates. It was shown that cells from an aerated P. diminuta culture were larger than cells from a similar but stationary culture. A retention test procedure for 0.2 μm rated membranes using cross-flow filtration was developed. The procedure simulated process conditions and enabled tubular ceramic monolithic membranes and flat-sheet membranes to be retention tested with P. diminuta. It is feasible that a standard retention test using cross-flow filtration can be developed. The time needed for results from current retention test procedures to become available is a consequence of using traditional cultural techniques for permeate analysis. Test procedure were developed using three popular methods for the rapid detection and enumeration of bacteria (ATP luminescence, impedance microbiology and the DEFT) for the detection and enumeration of P. diminuta in retention test permeates. The method using ATP luminescence was found to be the most applicable. The development of a bioluminescent strain of P. diminuta through genetic engineering will enable the rapid, sensitive and straightforward retention testing of 0.2 μm rated membranes. Retention tests using a bioluminescent strain of Escherichia coli containing the structural genes for bacterial luciferase indicated that the proposed test is feasible. Developments were made towards cloning the same genes into P. diminuta. The use of all bioluminescent micro-organisms for membrane retention testing is the subject of a patent application and a proposal for a three year SERC research grant.

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Anyanwu, Ezechukwu John. "The Effect of Flow on the Development and Retention of Iron Sulfide Corrosion ProductLayers." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1547118739941844.

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Books on the topic "Retention flow"

1

Patterson, Glenn G. Retention time and flow patterns in Lake Moultrie, South Carolina. U.S. Dept. of the Interior, Geological Survey, 1986.

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Patterson, Glenn G. Retention time and flow patterns in Lake Moultrie, South Carolina. U.S. Dept. of the Interior, Geological Survey, 1986.

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Patterson, Glenn G. Retention time and flow patterns in Lake Moultrie, South Carolina. U.S. Dept. of the Interior, Geological Survey, 1986.

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Patterson, Glenn G. Retention time and flow patterns in Lake Marion, South Carolina, 1984. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Patterson, Glenn G. Retention time and flow patterns in Lake Marion, South Carolina, 1984. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Patterson, Glenn G. Retention time and flow patterns in Lake Marion, South Carolina, 1984. U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Ryan, Babs. America's corporate brain drain: Why we leave, where we go, how we can reverse the flow. Sparks Worldwide, 2008.

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Bower, David E. Retention time simulation for Bushy Park Reservoir near Charleston, South Carolina. U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Bower, David E. Retention time simulation for Bushy Park Reservoir near Charleston, South Carolina. U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Bower, David E. Retention time simulation for Bushy Park Reservoir near Charleston, South Carolina. U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Book chapters on the topic "Retention flow"

1

Dhumale, Rahul. "The Cost of Capital: Earnings Retention vs Leverage." In Excess Cash Flow. Palgrave Macmillan UK, 2003. http://dx.doi.org/10.1057/9780230509511_4.

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Veldsman, Dieter. "The Flow@Work Model as a Talent Retention Framework for the Knowledge Economy." In Psychology of Retention. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-98920-4_2.

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Dhumale, Rahul. "Cash Retention Strategies: Test of Free Cash Flow Theory." In Excess Cash Flow. Palgrave Macmillan UK, 2003. http://dx.doi.org/10.1057/9780230509511_3.

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Dhumale, Rahul. "Earnings Retention as a Specification Mechanism in Predicting Corporate Bankruptcy." In Excess Cash Flow. Palgrave Macmillan UK, 2003. http://dx.doi.org/10.1057/9780230509511_5.

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Rawls, W. J., and D. L. Brakensiek. "Estimation of Soil Water Retention and Hydraulic Properties." In Unsaturated Flow in Hydrologic Modeling. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2352-2_10.

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Schimpf, Martin E., Louise M. Wheeler, and P. F. Romeo. "Copolymer Retention in Thermal Field-Flow Fractionation." In ACS Symposium Series. American Chemical Society, 1993. http://dx.doi.org/10.1021/bk-1993-0521.ch005.

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Miller, D. E. "Water Retention and Flow in Layered Soil Profiles." In SSSA Special Publications. Soil Science Society of America, 2015. http://dx.doi.org/10.2136/sssaspecpub5.c6.

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Lentle, Roger G., and Patrick W. M. Janssen. "Local Motility and Flow in Segments that Exhibit Volume Retention." In The Physical Processes of Digestion. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9449-3_9.

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Martin, Michel, Charles Van Batten, and Mauricio Hoyos. "Determination of Thermodiffusion Parameters from Thermal Field-Flow Fractionation Retention Data." In Thermal Nonequilibrium Phenomena in Fluid Mixtures. Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45791-7_13.

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Nimmo, John R., and Siamak Malek-Mohammadi. "Quantifying Water Flow and Retention in an Unsaturated Fracture-Facial Domain." In Dynamics of Fluids and Transport in Complex Fractured-Porous Systems. John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781118877517.ch12.

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Conference papers on the topic "Retention flow"

1

Repenning, Alexander, Ashok Basawapatna, Dorit Assaf, Carmine Maiello, and Nora Escherle. "Retention of Flow." In SIGCSE '16: The 47th ACM Technical Symposium on Computing Science Education. ACM, 2016. http://dx.doi.org/10.1145/2839509.2844597.

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Basawapatna, Ashok, and Alexander Repenning. "Employing Retention of Flow to Improve Online Tutorials." In SIGCSE '17: The 48th ACM Technical Symposium on Computer Science Education. ACM, 2017. http://dx.doi.org/10.1145/3017680.3017799.

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Moreno, Rosangela, and Vitor Hugo Sousa Ferreira. "Flow Rate Effect on Polymer Reversible Retention in Sandstone." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0896.

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Fischer, Christine, and Heidi Hamby. "A Novel Approach to Constant Flow-Rate Sand Retention Testing." In SPE International Conference and Exhibition on Formation Damage Control. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/189515-ms.

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Srikongsri, A., and R. J. Fannin. "Laboratory Evaluation of Select Retention Criteria for Cyclic Flow Conditions." In Geo-Frontiers Congress 2011. American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41165(397)210.

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Strömgren, T., Y. Moigne, D. Sheng, and C. Hartmann. "CFD Analysis to Demonstrate in Vessel Retention Inducing a Bypass Flow." In 14th WCCM-ECCOMAS Congress. CIMNE, 2021. http://dx.doi.org/10.23967/wccm-eccomas.2020.080.

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Grochowska, Jolanta. "THE FACTORS INFLUENCING ON THE PHOSPHORUS AND NITROGEN RETENTION IN FLOW LAKES." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/3.1/s12.093.

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Hu, Qiang, Xiao Yan, Shanfang Huang, Yanping Huang, and JunChong Yu. "Evaluation of Passive Circulation Flow Characteristics and CHF Under In-Vessel Retention." In 2016 24th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icone24-60507.

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A method to evaluate the effect of geometric structure and thermal hydraulic parameters on the passive circulation flow rates in the annular flow channel between the insulation structure and the lower head of the reactor pressure vessel and critical heat flux on the equator of lower head outer surface under core degradation accidents has been proposed in this work. Based on the one-dimensional steady-state mass, momentum and energy conservation equation, a numerical calculation model has been established. The drift flux model is adopted in the numerical calculation model since velocity difference between the liquid and vapor phase in the induced upward two-phase flow could be significant. The calculation results are compared with the available experiment data collected from the literature under the same condition for the validation of the numerical calculation model proposed in this work. The effects of the heating power, loss coefficient, flooding levels, gap clearance and inlet area on the passive circulation flow are studied in this study. Furthermore, combined with the CHF correlation proposed for the determination of the CHF on the downward heating surface, the variation of the CHF at the equator of lower head outer surface with those geometric structure and thermal hydraulic parameters are analyzed utilizing the numerical calculation model for the better understanding of the limitation of the in-vessel retention through external reactor vessel cooling.

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GRINBERGA, Linda, and Ainis LAGZDINS. "NUTRIENT RETENTION IN SURFACE FLOW CONSTRUCTED WETLAND IN AGRICULTURAL LAND IN LATVIA." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.179.

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The research site consists of a pilot-scale surface flow constructed wetland at the farm Mezaciruli located in Zalenieki County, Jelgava Region, in the middle part of Latvia. The constructed wetland was installed in June 2014 to improve water quality in agricultural catchment and examine nutrient retention at the constructed wetland receiving surface and drainage runoff. The constructed wetland’s surface area of 0.37 ha corresponds to 0.5 % of the total catchment area. During the observation period of 32 months (2014-2017) water quality parameters such as total suspended solids (TSS), nitrate-nitrogen (NO3-N), ammonium-nitrogen (NH4-N), total nitrogen (TN), orthophosphate-phosphorus (PO4-P), and total phosphorus (TP) were monitored twice a month using a grab sample approach. Retention efficiency for monitored water quality parameters was calculated based on their concentrations at the inlet and outlet. The monitoring results obtained during this study showed a reduction within the constructed wetland for all examined parameters. The concentrations of NO3-N, NH4-N and TN were reduced on average by 13 %, 15 % and 16 %, respectively. PO4-P and TP concentrations were reduced on average by 38 % and 36 %, respectively. Total suspended solids were reduced by 31% at the outlet of the constructed wetland. However, in some cases, an increase in nutrient concentrations in water leaving the constructed wetland was observed. Therefore, there is a need for further research to investigate causes of such increase.

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Park, D. S., S. King, K. E. Thompson, C. S. Willson, and D. E. Nikitopoulos. "Flow Visualization in Artificial Porous Media From Microfluidic PMMA Devices." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65266.

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Microfluidic polymethylmethacrylate (PMMA) devices for study of particle transport in artificial porous media were designed and microfabricated using hot embossing with a brass mold insert containing a microchannel network with eight layers. After thermal bonding to enclose the microchannel network, a process protocol was applied to successfully remove bubbles in the PMMA device. Characterization protocols were developed for study of fluorescent particle tracking, accumulation, and retention in these microfluidic chip artificial porous media. Particle accumulation and retention was observed throughout the microfluidic network domain and predominantly at the inlet section of the PMMA device due to entrance effects. Particle Image Velocimetry of the PMMA device allowed for generating velocity profiles in the chip microchannel networks.

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Reports on the topic "Retention flow"

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Abramowitz, Howard, Marek Brandys, Richard Cecil, et al. TECHNETIUM RETENTION IN WTP LAW GLASS WITH RECYCLE FLOW-SHEET DM10 MELTER TESTING VSL-12R2640-1 REV 0. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1059435.

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Durbin, Samuel, Eric Lindgren, and Ramon Pulido. Measurement of Particulate Retention in Microchannel Flows. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1761926.

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Retention time and flow patterns in Lake Moultrie, South Carolina. US Geological Survey, 1986. http://dx.doi.org/10.3133/wri854121.

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Retention time and flow patterns in Lake Marion, South Carolina, 1984. US Geological Survey, 1995. http://dx.doi.org/10.3133/wri954145.

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The effects of flow-path modification on water-quality constituent retention in an urban stormwater detention pond and wetland system, Orlando, Florida. US Geological Survey, 1996. http://dx.doi.org/10.3133/wri954297.

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