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MIXING STUDY FOR JT-71/72 TANKS

Description: All modeling calculations for the mixing operations of miscible fluids contained in HBLine tanks, JT-71/72, were performed by taking a three-dimensional Computational Fluid Dynamics (CFD) approach. The CFD modeling results were benchmarked against the literature results and the previous SRNL test results to validate the model. Final performance calculations were performed by using the validated model to quantify the mixing time for the HB-Line tanks. The mixing study results for the JT-71/72 ta… more
Date: November 26, 2013
Creator: Lee, S.
Partner: UNT Libraries Government Documents Department
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Modeling Bimolecular Reactions and Transport in Porous Media Via Particle Tracking

Description: We use a particle-tracking method to simulate several one-dimensional bimolecular reactive transport experiments. In this numerical method, the reactants are represented by particles: advection and dispersion dominate the flow, and molecular diffusion dictates, in large part, the reactions. The particle/particle reactions are determined by a combination of two probabilities dictated by the physics of transport and energetics of reaction. The first is that reactant particles occupy the same volu… more
Date: January 1, 2012
Creator: Ding, Dong; Benson, David; Paster, Amir & Bolster, Diogo
Partner: UNT Libraries Government Documents Department
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Defining And Characterizing Sample Representativeness For DWPF Melter Feed Samples

Description: Representative sampling is important throughout the Defense Waste Processing Facility (DWPF) process, and the demonstrated success of the DWPF process to achieve glass product quality over the past two decades is a direct result of the quality of information obtained from the process. The objective of this report was to present sampling methods that the Savannah River Site (SRS) used to qualify waste being dispositioned at the DWPF. The goal was to emphasize the methodology, not a list of outco… more
Date: October 29, 2013
Creator: Shine, E. P. & Poirier, M. R.
Partner: UNT Libraries Government Documents Department
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Simulations of Turbulent Flows with Strong Shocks and Density Variations: Final Report

Description: The target of this SciDAC Science Application was to develop a new capability based on high-order and high-resolution schemes to simulate shock-turbulence interactions and multi-material mixing in planar and spherical geometries, and to study Rayleigh-Taylor and Richtmyer-Meshkov turbulent mixing. These fundamental problems have direct application in high-speed engineering flows, such as inertial confinement fusion (ICF) capsule implosions and scramjet combustion, and also in the natural occurr… more
Date: October 1, 2012
Creator: Lele, Sanjiva
Partner: UNT Libraries Government Documents Department
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Initial Investigation of Waste Feed Delivery Tank Mixing and Sampling Issues

Description: The Hanford tank farms contractor will deliver waste to the Waste Treatment Plant (WTP) from a staging double-shell tank. The WTP broadly classifies waste it receives in terms of “Envelopes,” each with different limiting properties and composition ranges. Envelope A, B, and C wastes are liquids that can include up to 4% entrained solids that can be pumped directly from the staging DST without mixing. Envelope D waste contains insoluble solids and must be mixed before transfer. The mixing and sa… more
Date: October 1, 2007
Creator: Fort, James A.; Bamberger, Judith A.; Meyer, Perry A. & Stewart, Charles W.
Partner: UNT Libraries Government Documents Department
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Pulse Jet Mixing Tests With Noncohesive Solids

Description: This report summarizes results from pulse jet mixing (PJM) tests with noncohesive solids in Newtonian liquid. The tests were conducted during FY 2007 and 2008 to support the design of mixing systems for the Hanford Waste Treatment and Immobilization Plant (WTP). Tests were conducted at three geometric scales using noncohesive simulants, and the test data were used to develop models predicting two measures of mixing performance for full-scale WTP vessels. The models predict the cloud height (the… more
Date: February 17, 2012
Creator: Meyer, Perry A.; Bamberger, Judith A.; Enderlin, Carl W.; Fort, James A.; Wells, Beric E.; Sundaram, S. K. et al.
Partner: UNT Libraries Government Documents Department
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On the Stability of the Laminar Mixing Region Between Two Parallel Streams in a Gas

Description: Note presenting a study of the stability of the mixing of two streams both for the interest in the problem and for clarifying certain points in the basic stability theory. Results show that when the relative speed of the two parallel streams exceeds the sum of their velocities of sound, subsonic oscillations cannot occur and the mixing region can be expected to be stable with respect to small disturbances.
Date: January 1953
Creator: Lin, C. C.
Partner: UNT Libraries Government Documents Department
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Laminar mixing of a compressible fluid

Description: From Summary: "A theoretical investigation of the velocity profiles for laminar mixing of a high-velocity stream with a region of fluid at rest has been made assuming that the Prandtl number is unity. A method which involves only quadratures is presented for calculating the velocity profile in the mixing layer for an arbitrary value of the free-stream Mach number. Detailed velocity profiles have been calculated for free-stream Mach numbers of 0, 1, 2, 3, and 5."
Date: February 1949
Creator: Chapman, Dean R.
Partner: UNT Libraries Government Documents Department
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Status of the Daya Bay Reactor Neutrino Oscillation Experiment

Description: The last unknown neutrino mixing angle theta_13 is one of the fundamental parameters of nature; it is also a crucial parameter for determining the sensitivity of future long-baseline experiments aimed to study CP violation in the neutrino sector. Daya Bay is a reactor neutrino oscillation experiment designed to achieve a sensitivity on the value of sin^2(2*theta_13) to better than 0.01 at 90percent CL. The experiment consists of multiple identical detectors placed underground at different basel… more
Date: December 15, 2010
Creator: Collaboration, Daya Bay & Lin, Cheng-Ju Stephen
Partner: UNT Libraries Government Documents Department
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In Situ Enhanced Soil Mixing. Innovative Technology Summary Report

Description: In Situ Enhanced Soil Mixing (ISESM) is a treatment technology that has been demonstrated and deployed to remediate soils contaminated with volatile organic volatile organic (VOCs). The technology has been developed by industry and has been demonstrated with the assistance of the U.S. Department of Energy's Office of Science and Technology and the Office of Environmental Restoration.
Date: February 1, 1996
Partner: UNT Libraries Government Documents Department
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Comparison of Waste Feed Delivery Small Scale Mixing Demonstration Simulant to Hanford Waste

Description: The Hanford double-shell tank (DST) system provides the staging location for waste that will be transferred to the Hanford Tank Waste Treatment and Immobilization Plant (WTP). Specific WTP acceptance criteria for waste feed delivery describe the physical and chemical characteristics of the waste that must be met before the waste is transferred from the DSTs to the WTP. One of the more challenging requirements relates to the sampling and characterization of the undissolved solids (UDS) in a wast… more
Date: September 1, 2011
Creator: Wells, Beric E.; Gauglitz, Phillip A. & Rector, David R.
Partner: UNT Libraries Government Documents Department
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Investigation of Turbulent Mixing Processes

Description: "With water as driving medium and delivered medium in a device similar to a simple jet apparatus, the pressure and velocity fields of the mixing zone were explored with a pitot bar; the ratio of delivered to driving volume ranged between the values 0, 1, 2, and 4. An attempt was also made to analyze the mixing flow mathematically by integration of the equation of motion, with the aid of conventional formulas for the turbulent shearing stress, but this succeeded only approximately for the very s… more
Date: October 1946
Creator: Viktorin, K.
Partner: UNT Libraries Government Documents Department
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Modeling and Simulation of Fluid Mixing Laser Experiments and Supernova

Description: The three year plan for this project is to develop novel theories and advanced simulation methods leading to a systematic understanding of turbulent mixing. A primary focus is the comparison of simulation models (both Direct Numerical Simulation and subgrid averaged models) to experiments. The comprehension and reduction of experimental and simulation data are central goals of this proposal. We will model 2D and 3D perturbations of planar interfaces. We will compare these tests with models deri… more
Date: June 24, 2008
Creator: Glimm, James
Partner: UNT Libraries Government Documents Department
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Modeling and Simulation of Fluid Mixing Laser Experiments and Supernova

Description: The three year plan for this project was to develop novel theories and advanced simulation methods leading to a systematic understanding of turbulent mixing. A primary focus is the comparison of simulation models (Direct Numerical Simulation (DNS), Large Eddy Simulations (LES), full two fluid simulations and subgrid averaged models) to experiments. The comprehension and reduction of experimental and simulation data are central goals of this proposal. We model 2D and 3D perturbations of planar o… more
Date: June 4, 2009
Creator: Glimm, James
Partner: UNT Libraries Government Documents Department
open access

Numerical simulations of shock-induced mixing and combustion

Description: In this paper we use numerical simulation to investigate shock-induced ignition and combustion of a hydrocarbon gas. The focus of this paper is on quantifying the effect of fidelity in the chemical kinetics on the overall solution. We model the system using the compressible Navier Stokes equations for a reacting mixture. These equations express conservation of species mass, momentum, total energy.
Date: July 27, 2003
Creator: Bell, John B.; Day, Marc S. & Kuhl, A.
Partner: UNT Libraries Government Documents Department
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Modeling and Simulation of Fluid Mixing Laser Experiments and Supernova; Reporting Period 5/1/06-4/30/07

Description: The three year plan for this project is to develop novel theories and advanced simulation methods leading to a systematic understanding of turbulent mixing. A primary focus is the comparison of simulation models (both Direct Numerical Simulation and subgrid averaged models) to experiments. The comprehension and reduction of experimental and simulation data are central goals of this proposal. We will model 2D and 3D perturbations of planar interfaces. We will compare these tests with models deri… more
Date: May 23, 2007
Creator: Glimm, James
Partner: UNT Libraries Government Documents Department
open access

Effects of Parallel-Jet Mixing on Downstream Mach Number and Stagnation Pressure With Application to Engine Testing in Supersonic Tunnels

Description: "A one-dimensional analysis of the results of the parallel-jet mixing encountered in the testing of engines in supersonic wind tunnels is reported. Equations were derived for determining the totla pressure and Mach number behind the tunnel terminal shock. The method represents a simple procedure for determining these quantities while a tunnel is still in the design stage" (p. 1).
Date: March 1953
Creator: Bernstein, Harry
Partner: UNT Libraries Government Documents Department
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Theory of the Jet Syphon

Description: Note presenting a new approach to the theory of the mixing of two currents in an injector which deals with an incompressible ideal fluid. The theory shows new potentialities in an appropriate shaping of the form of the walls of the mixing zone so as to improve the jet-syphon efficiency beyond the heretofore theoretically predicted. A few examples of ways to improve jet-syphon efficiency are indicated.
Date: May 1955
Creator: Szczeniowski, B.
Partner: UNT Libraries Government Documents Department
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