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Tuesday, May 12, 2020 | History

2 edition of Validation of models of gas holdup in the CORCON code found in the catalog.

Validation of models of gas holdup in the CORCON code

J. E. Brockmann

Validation of models of gas holdup in the CORCON code

by J. E. Brockmann

  • 232 Want to read
  • 27 Currently reading

Published by Division of Systems Research, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission in Washington, DC .
Written in English

    Subjects:
  • Oleic acid -- Mathematical models.,
  • Nuclear power plants -- Accidents.

  • Edition Notes

    Statementprepared by J.E. Brockmann, F.E. Arellano, D.A. Lucero.
    ContributionsArellano, F. E., Lucero, D. A., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Research., Sandia National Laboratories.
    The Physical Object
    Paginationviii, 45 p. :
    Number of Pages45
    ID Numbers
    Open LibraryOL15386781M

      For evaluating turbulence, the modified k–ε model is chosen. Gas holdup, gas superficial velocity and liquid velocity profiles for different heights column are obtained by varying air volumetric flow rates at 2, 5 and 8 L/min. Also gas holdup, gas superficial velocity and liquid velocity contours are obtained for a sequence of five step by: 7.   I suspect you may need to model the flow going around the bubble to get it and that will need a eularian model - and x longer solve time. Of course I don't know exactly what physics cause bubble hold up (In fact I don't even know what bubble hold up .

    VIRGINIA FUEL GAS CODE 04_Va_Fuel_pS 1 M:\data\CODES\STATE CODES\Virginia\\Fuel Gas Code\Final VP\04_Va_Fuel_vp Wednesday, Ap PM Color profile: Generic CMYK printer profile Composite Default screenFile Size: KB. and guidelines for the safe installation of gas service for the company’s customers. The codes that are referenced and the information provided in no sense relieves the customer of the responsibility to install gas piping and appliances in accordance with the latest revisions of the applicable governing codes that are listed in Section 2.

    GAS AND LIQUID MEASUREMENT VALIDATION NEW AUDIT REQUIREMENTS EXPAND THE FOCUS ON MEASUREMENT DATA INTEGRITY Mike Squyres Flow-Cal, Inc. Bay Area Blvd., suite Houston, Texas INTRODUCTION Fundamental to all electronic gas measurement (EGM) and electronic liquids measurement (ELM) systems is theFile Size: 41KB. @article{osti_, title = {Mechanistic models for the prediction of CO{sub 2} corrosion rates under multi-phase flow conditions}, author = {Pots, B F.M.}, abstractNote = {A methodology for CO{sub 2} corrosion rate prediction is presented which is based on mechanistic modelling. The effect of fluid flow is included, which hitherto often has been ignored.


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Validation of models of gas holdup in the CORCON code by J. E. Brockmann Download PDF EPUB FB2

Get this from a library. Validation of models of gas holdup in the CORCON code. [J E Brockmann; F E Arellano; D A Lucero; U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Research.; Sandia National Laboratories.].

@article{osti_, title = {An assessment of the CORCON-MOD3 code. Part 1: Thermal-hydraulic calculations}, author = {Strizhov, V and Kanukova, V and Vinogradova, T and Askenov, E and Nikulshin, V}, abstractNote = {This report deals with the subject of CORCON-Mod3 code validation (thermal-hydraulic modeling capability only) based on MCCI (molten core concrete interaction) experiments.

Fig. 9 presents time-averaged gas holdup contours for a grid resolution of 40 × cells without using the BP model, comparing the two drag models. Two high gas holdup regions form off-center using the Schiller–Naumann model at lower axial heights, whereas the White model predicts a more homogeneous gas holdup throughout the entire liquid by: Fig.

2a depicted the variation of overall gas holdup CFD result in the ILALR versus the time at lowest input riser gas superficial velocity (U gr = × 10 −3 m/s) in four different nodes.

It was found with increasing in the number of nodes from Node 2 to Node 4, the overall gas holdup CFD results, closely was changed. So in order to reduce the computational effort, the simulation was Cited by: 1. A gas-liquid Eulerian computational fluid dynamics (CFD) model coupled with a population balance equation (PBE) was presented to investigate hydrodynamics of a bubble column with hydrocracking reactions in H 2-vacuum residue oil system (H 2-VR) in terms of pressure drop, gas holdup, mean bubble size, and bubble surface area.

The column had a. Hi, I am trying to model the 2-D flow dyanmics of bubble column (gas-liquid flow) using FLUENT, however, I do not get right profile result of the Gas Hold-Up (Gas Volume Fraction). I am trying to work on the Half Domain model because the bubble column.

The abrupt change on the curve of gas holdup vs. superficial gas velocity calculated from the dual-bubble-size (DBS) model was physically interpreted as a shift from the homogeneous and transition. Gas holdup data for oleci acid at K and for steel at K has been taken for nitrogen sparging gas.

The liquid levels have been measured using a real time x-ray technique. This paper investigates the numerical modelling of hydrodynamics and gas dispersion in the first compartment of an autoclave.

A scaled down model of an 80 m3 Sherritt Gordon horizontal autoclave. The storage system for liquefied petroleum gas shall be designed and installed in accordance with the International Fire Code and NFPA Modifications to Existing Systems In modifying or adding to existing piping systems, sizes shall be maintained in accordance with this chapter.

A summary of all available correlations and mechanistic models for the prediction of slug liquid holdup is presented. Additionally, an experimental data base for slug liquid holdup has been collected from available literature. The data base shows a gap for large diameter pipes, high pressure systems and Author: E.

Pereyra, R. Arismendi, L. Gomez, R. Mohan, O. Shoham, G. Kouba. Gas Holdup Gas holdup is one of the most important operating parameters because it not only governs phase fraction and gas-phase residence time but is also crucial for mass transfer between liquid and gas.

Gas holdup depends chiefly on gas flow rate, but also to a great extent on the gas – liquid system involved. The volumetric flow rate of gas to be provided, in cubic feet per hour, shall be calculated using the manufacturer's input ratings of the appliances served adjusted for an input rating is not indicated, the gas supplier, appliance manufacturer or a qualified agency shall be contacted, or the rating from Table shall be used for estimating the volumetric flow rate of gas to.

Generalized Autoregressive Score models. Before using any code, please read the disclaimer. R code. R package corresponding to Gorgi, Paolo, Peter R. Hansen, Pawel Janus and Siem Jan Koopman (): "Realized Wishart-GARCH: A Score-driven Multi-Asset Volatility Model", Journal of Financial Econometrics.

Computer code: R package Wishart. GAS package R by David Ardia, Kris Boudt, and. The mean gas holdup was %, and consequently the effective pulp volume of collection zone was %.The gas concentration on top of froth was recorded for RTD measurement of the gas.

Gas-liquid stirred tanks are widely used in various chemical engineering processes such as fermentation and pharmaceutical production. In the Author: Nao Ishida, Al Abri Mohammed, Atsushi Sekimoto, Yasunori Okano, Shinya Abe, Kosuke Tanaka. Fuel Gas Code ® (IFGC ®) and International Residential Code (IRC®).

It will cover both the longest length method and the branch length method. Applicable code tables, figures and example problems and solutions are provided for each method to help the reader easily understand the pipe sizing methodology.

General Criteria and Related File Size: 1MB. Gas holdup in the collection zone of a flotation column is an important operational variable. Two methods of gas holdup determination are from: (1) pressure and (2) conductance measurements. Observations in the gas and liquid velocity vector maps and the gas holdup contour map (Figures and ) reveal that gas is discharged from the impeller region into the impeller stream, and two vortices are formed close to the blade gas holdup contours show that.

Urban et al. established an improved TDG generation model after analyzing gas holdup as a function of flow characteristics by area. A three-dimensional (3D) model was later developed by Politano et al. (,); in their model, variations in bubble size are taken into account using a bubble density equation.

– Gas holdup. Directly related to rise velocity. Correlations of the form α~ u sg aρ l bσcµ l d are commonly used.

– Mass transfer coefficient k la. Correlations of the form kla ~ u sg aρ l bσcµ l d µ g eDf∆ρg are commonly used. – Axial dispersion occurs in both the liquid and gas phase, and correlations for each are available File Size: KB. The holdup coefficient is constant but case dependent based on estimates of remaining water [Table 2 in Tijsseling et al.

]. It is clear that, taking the holdup effect into account, the resulting propulsion is slightly and largely overestimated in Runs 2 and 6, [email protected]{osti_, title = {CORCON-MOD3: An integrated computer model for analysis of molten core-concrete interactions.

User`s manual}, author = {Bradley, D R and Gardner, D R and Brockmann, J E and Griffith, R O}, abstractNote = {The CORCON-Mod3 computer code was developed to mechanistically model the important core-concrete interaction phenomena, including those Cited by: