Modifications to MacCormack's 2-D Navier-Stokes Compression Ramp Code for Application to Flows with Axes of Symmetry and Wall Mass Transfer PDF Download
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Author: Richard G. Hindman
Publisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 60
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Book Description
A computer code for solving the two-dimensional compressible Navier-Stokes equations governing the supersonic/hypersonic flow over a compression ramp as developed by MacCormack was extended to apply to axisymmetric flows over cylinder-flare shapes. Two new operators were developed for this extension, one of which was found to produce an upper stability bound on the step size. This bound is proportional to the Prandtl number and inversely proportional to the ratio of thermal capacities of the fluid times the maximum value over all grid points of the kinematic viscosity scaled by the radial coordinate value. Additionally, the computer code was modified to allow for the option of wall mass transfer. This required reformulation of the hyperbolic fine mesh operator because of an assumption in the development of the original operator that the wall-normal velocity in the fine mesh is much less than the sound speed. Numerical results are presented for a particular hollow cylinder-flare configuration, and comparisons are made with the experimental data of Roshko and Thomke and with the results of a boundary-layer code attributable to Patankar and Spalding. (Author).
Author: Kim Hazelwood
Publisher: Morgan & Claypool Publishers
ISBN: 1608454584
Category : Computers
Languages : en
Pages : 83
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Book Description
Dynamic binary modification tools form a software layer between a running application and the underlying operating system, providing the powerful opportunity to inspect and potentially modify every user-level guest application instruction that executes. Toolkits built upon this technology have enabled computer architects to build powerful simulators and emulators for design-space exploration, compiler writers to analyze and debug the code generated by their compilers, software developers to fully explore the features, bottlenecks, and performance of their software, and even end-users to extend the functionality of proprietary software running on their computers. Several dynamic binary modification systems are freely available today that place this power into the hands of the end user. While these systems are quite complex internally, they mask that complexity with an easy-to-learn API that allows a typical user to ramp up fairly quickly and build any of a number of powerful tools. Meanwhile, these tools are robust enough to form the foundation for software products in use today. This book serves as a primer for researchers interested in dynamic binary modification systems, their internal design structure, and the wide range of tools that can be built leveraging these systems. The hands-on examples presented throughout form a solid foundation for designing and constructing more complex tools, with an appreciation for the techniques necessary to make those tools robust and efficient. Meanwhile, the reader will get an appreciation for the internal design of the engines themselves. Table of Contents: Dynamic Binary Modification: Overview / Using a Dynamic Binary Modifier / Program Analysis and Debugging / Active Program Modification / Architectural Exploration / Advanced System Internals / Historical Perspectives / Summary and Observations
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Category :
Languages : en
Pages :
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Category : Wisconsin
Languages : en
Pages :
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Author: Seattle (Wash.). Department of Construction and Land Use
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Category : Building laws
Languages : en
Pages : 3
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Author: San Francisco (Calif.). Wastewater Management Program
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Category : Ocean outfalls
Languages : en
Pages :
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Attachments -- Appendices -- Supplemental appendices.
Author: URS.
Publisher:
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Category : Electric generator industry
Languages : en
Pages : 51
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Author: Richard G. Hindman
Publisher:
ISBN:
Category : Axial flow compressors
Languages : en
Pages : 60
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Book Description
A computer code for solving the two-dimensional compressible Navier-Stokes equations governing the supersonic/hypersonic flow over a compression ramp as developed by MacCormack was extended to apply to axisymmetric flows over cylinder-flare shapes. Two new operators were developed for this extension, one of which was found to produce an upper stability bound on the step size. This bound is proportional to the Prandtl number and inversely proportional to the ratio of thermal capacities of the fluid times the maximum value over all grid points of the kinematic viscosity scaled by the radial coordinate value. Additionally, the computer code was modified to allow for the option of wall mass transfer. This required reformulation of the hyperbolic fine mesh operator because of an assumption in the development of the original operator that the wall-normal velocity in the fine mesh is much less than the sound speed. Numerical results are presented for a particular hollow cylinder-flare configuration, and comparisons are made with the experimental data of Roshko and Thomke and with the results of a boundary-layer code attributable to Patankar and Spalding. (Author).
Author: Seattle (Wash.). Department of Planning and Development
Publisher:
ISBN:
Category : Building laws
Languages : en
Pages : 5
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Author: Pantex Plant (U.S.)
Publisher:
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Category : Groundwater
Languages : en
Pages : 15
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Author: Ralph R. Roberts
Publisher: John Wiley & Sons
ISBN: 0470501995
Category : Business & Economics
Languages : en
Pages : 316
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Book Description
The crucial information you need to secure a reliable loan modification and save your home Behind on your mortgage payments? Worried about losing your home? Don't panic. Loan Modification For Dummies gives you the reliable, authoritative, easy-to-understand guidance you need to apply for and secure a loan modification that lowers your monthly house payment and keeps you in your home. This practical, plain-English guide leads you step by step through the loan modification process, from contacting your lender to applying for a loan modification, evaluating the lender's initial offer, and negotiating a modification that lowers your monthly payment while helping you catch up on any past-due amounts. You'll learn how to communicate with your bank or loan servicer, recognize and avoid loan-modification scams, and find a knowledgeable loan modification specialist, if you choose not to do it yourself. Advice on determining whether you're likely to qualify for your lender's loan modification program Guidance on preparing and submitting a loan modification application that improves your chances of success Helps you figure out a monthly payment you really can afford Tips on modifying your loan even when you owe more than your home's current market value Negotiation advice for securing the best possible terms and lowest monthly payment Resources for contacting your lender, obtaining free or affordable third-party assistance, and getting government agencies on your side Read Loan Modification For Dummies and start saving your home today.
