Download or read book An Implicit Two Phase Flow Numerical Simulator for Modeling Secondary Water Recovery by Air Injection written by George Julius Moridis and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two dimensional Flow Modeling written by Robert C. MacArthur and published by . This book was released on 1982 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On the Formulation and Numerical Evaluation of a Set of Two phase Flow Equations Modelling the Cooldown Process written by Stephen Jarvis and published by . This book was released on 1965 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model of transient two-phase flow in a pipe is constructed in Eulerian coordinates assuming a single velocity but independent temperatures in the two phases.Experiments on the numerical integration of the system for Cooldown problem by both Lax and Courant-Isaacson-Rees methods indicate that a very fine spatial difference * net must be used to compensate for the numerical diffusion essential to computational stability if a second surge is to be realized. (Author).
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Two phase Flow Using the Level Set Approach written by Lan Zhang and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we present numerical schemes in simulating immiscible two-phase flow problems. The goal of this work is to find unified solutions for numerical modeling of any kind of immiscible two-phase flow with moving interface. Fluid flows are modeled using Navier Stokes equations with discontinuous coefficients. We introduce the Volume Fraction method to evaluate discontinuous integrals arise from the variational formulation in the Finite Element method. The use of Volume Fraction method avoids the approximation of the Dirac Delta function, and therefore no regularization procedures are needed. Several operator splitting variants are studied in detail in linearized and non-linearized fashion, when we want to evaluate the discontinuous coefficients. Interface is captured using the Level Set approach, where a transport equation is solved numerically with fourth order scheme without any stabilization terms. The surface tension effect is implemented in a semi-implicit way, thus larger time steps can be used compared with the explicit method. A recent, well-developed re-initialization technique is included as a way to preserve the signed distance property of the Level Set function. All mentioned numerical methods are used to build two-dimensional solvers. Solvers have been tested both with single-phase flow and two-phase flow benchmark problems. In particular, the bubble dynamics are presented to validate stated numerical schemes.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1985 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1983 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Reservoir Simulation Using MATLAB GNU Octave written by Knut-Andreas Lie and published by Cambridge University Press. This book was released on 2019-08-08 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents numerical methods for reservoir simulation, with efficient implementation and examples using widely-used online open-source code, for researchers, professionals and advanced students. This title is also available as Open Access on Cambridge Core.
Download or read book Transactions of the American Institute of Mining Metallurgical and Petroleum Engineers written by American Institute of Mining, Metallurgical, and Petroleum Engineers and published by . This book was released on 1970 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some vols., 1920-1949, contain collections of papers according to subject.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A numerical simulation model for transient two phase flow in a pipeline written by Myles Wilson Scoggins and published by . This book was released on 1977 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Das Eherecht der Katholiken im Kaiserthum Oesterreich nach den Bestimmungen des kaiserlichen Patentes vom 8 Oktober 1856 written by and published by . This book was released on 1857 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Front capturing Method for the Numerical Simulation of Dispersed Two phase Flow written by Emil Rustam Ardeshir Coyagee and published by . This book was released on 2007 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions written by Metallurgical Society of AIME. and published by . This book was released on 1970 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Schemes for 1 d Two phase Flows written by Qiulan Zeng and published by . This book was released on 2017 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling of two-phase flows with strong thermal and mechanical non-equilibrium ef- fects is important in engineering applications, such as the nuclear industry. The Advection Upstream Splitting Methods (AUSM-family schemes) are very popular due to their at- tractive features for multiphase flow modeling. However, the computational efficiency of collocated-grid-based AUSM-family schemes with explicit time integration are inferior due to a number of issues. These include the odd-even decoupling of the collocated-grid-based AUSM-family schemes for low-Mach-number flows, the non-conservative characteristic of the two-phase governing equations, and the Courant-Friedrichs-Levy (CFL) number limi- tation for the explicit time integration. This thesis focuses on improving the accuracy and efficiency of calculation for all-Mach- number two-phase flows. In order to achieve this objective, this thesis makes the first attempt at using implicit staggered-grid-based AUSM-family (SG-AUSM-family) schemes. This is a novel approach since most work in the publicly available literature solves multi- phase compressible flow problems explicitly over collocated grids. In this thesis, a four- equation generic two-fluid model is mainly considered. In addition, Newton's method with a numerical Jacobian matrix is employed to solve the implicitly discretized equations. The benchmark test cases include Ransom's water faucet, the oscillating manometer, the phase separation, and the air-water shock tube problems. In the first stage, after thorough mathematical analysis and numerical tests of various explicit AUSM-family schemes on collocated grids, insight into the numerical dissipation mechanism of the AUSM-family schemes was gained. This motivates the author to propose a new scheme, namely, the staggered-grid-based AUSMFVS (SG-AUSMFVS) scheme, to solve the stiff phase separation problem. The second stage of the work is to examine the numerical accuracy and computational efficiency of collocated-grid-based implicit AUSM-family schemes. Results demonstrate that with certain time step size selections, the implicit AUSM-family schemes are superior to their explicit counterparts, in terms of numerical accuracy and computational efficiency. The third phase of the work is the application of the first-order SG-AUSM-family schemes on the benchmark test cases. Results demonstrate the advantages of staggered- grid-based AUSM + (SG-AUSM + ) and staggered-grid-based AUSMDV (SG-AUSMDV) over their collocated-grid-based counterparts. With a staggered-grid arrangement, odd-even de- coupling issues can be avoided. As a result, no additional diffusion terms are needed when using SG-AUSM + and SG-AUSMDV schemes for low-Mach-number two-phase flows. Fur- thermore, since the pressure and void fraction are already stored at the interface of the velocity control volume, no interpolation of interfacial pressure is needed for the momen- tum equations, thereby saving computational time. Finally, the SG-AUSM + scheme is capable of producing accurate solutions comparable with or even better than the corre- sponding collocated-grid-based AUSM + scheme. In particular, the new SG-AUSMFVS scheme demonstrates superb stability and accuracy for all the test cases considered in this thesis. Finally, the SG-AUSM-family schemes have been extended to second-order spatial ac- curacy using the classical Monotonic Upstream-Centered Scheme for Conservation Laws (MUSCL) approach with TVD limiters. The MUSCL technique with the van Albada lim- iter has also been implemented into the mass equation in CATHENA4. This resulted in improved accuracy of the CATHENA44 code, especially for the oscillating manometer problem. In summary, this thesis not only improves the accuracy and efficiency of calculation for all-Mach-number two-phase flows, but also helps integrate high-resolution schemes and SG-AUSM-family schemes into staggered-grid-based thermal hydraulic codes in the nuclear industry, such as CATHENA4.
