Shocks in Granular Flows- Analytical and Computational Studies PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Shocks in Granular Flows- Analytical and Computational Studies PDF full book. Access full book title Shocks in Granular Flows- Analytical and Computational Studies by Brian Patrick Lawney. Download full books in PDF and EPUB format.
Author: Brian Patrick Lawney
Publisher:
ISBN:
Category :
Languages : en
Pages : 161
Get Book Here
Book Description
This dissertation concerns the analytical and numerical modeling of compressible shock in granular systems and its applications. Kinetic theory and classical thermodynamic arguments suggest that granular flows with low agitation (granular temperature) may be characterized as supersonic, experiencing almost discontinuous changes in flow properties across shock fronts created by obstructing bodies. Uniform and non-uniform flows are studied analytically and with discrete element numerical simulations in different geometries. We derive a set of algebraic relations to describe property changes local to the shock and expand the analysis with use of a system of coupled shock depth-averaged differential equations. These expressions are applied to uniform flow incident on straight wedge obstructions and comparison with simulations reveals good quantitative agreement. Finally we make use of discrete element simulations and apply kinetic theory analysis to shear flow about circular bodies to explain the production of propeller-shaped density features about embedded moons in the rings of Saturn. These density features are interpreted as being predominantly created by collisional processes, in contrast to prior studies where gravitation is incorporated. We adapt the general depth- averaged differential equations for application to this system and find reasonable qualitative predictions for the shock front.
Author: Brian Patrick Lawney
Publisher:
ISBN:
Category :
Languages : en
Pages : 161
Get Book Here
Book Description
This dissertation concerns the analytical and numerical modeling of compressible shock in granular systems and its applications. Kinetic theory and classical thermodynamic arguments suggest that granular flows with low agitation (granular temperature) may be characterized as supersonic, experiencing almost discontinuous changes in flow properties across shock fronts created by obstructing bodies. Uniform and non-uniform flows are studied analytically and with discrete element numerical simulations in different geometries. We derive a set of algebraic relations to describe property changes local to the shock and expand the analysis with use of a system of coupled shock depth-averaged differential equations. These expressions are applied to uniform flow incident on straight wedge obstructions and comparison with simulations reveals good quantitative agreement. Finally we make use of discrete element simulations and apply kinetic theory analysis to shear flow about circular bodies to explain the production of propeller-shaped density features about embedded moons in the rings of Saturn. These density features are interpreted as being predominantly created by collisional processes, in contrast to prior studies where gravitation is incorporated. We adapt the general depth- averaged differential equations for application to this system and find reasonable qualitative predictions for the shock front.
Author: Dale Arden Anderson
Publisher:
ISBN:
Category : Differential equations, Partial
Languages : en
Pages : 6
Get Book Here
Book Description
Author: Yesaswi Narendra Chilamkurti
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
Get Book Here
Book Description
Author: Adolf Busemann
Publisher:
ISBN:
Category : Gas flow
Languages : en
Pages : 30
Get Book Here
Book Description
The analytical methods that appear to be best suited to the treatment of two-dimensional flow with detached shock waves are reviewed, and a short discussion of the applications of these methods is given without details or proofs.
Author: Tracy J. Vogler
Publisher: Springer
ISBN: 9783030230012
Category : Science
Languages : en
Pages : 294
Get Book Here
Book Description
Granular forms of common materials such as metals and ceramics, sands and soils, porous energetic materials (explosives, reactive mixtures), and foams exhibit interesting behaviors due to their heterogeneity and critical length scale, typically commensurate with the grain or pore size. Under extreme conditions of impact, granular and porous materials display highly localized phenomena such as fracture, inelastic deformation, and the closure of voids, which in turn strongly influence the bulk response. Due to the complex nature of these interactions and the short time scales involved, computational methods have proven to be powerful tools to investigate these phenomena. Thus, the coupled use of experiment, theory, and simulation is critical to advancing our understanding of shock processes in initially porous and granular materials. This is a comprehensive volume on granular and porous materials for researchers working in the area of shock and impact physics. The book is divided into three sections, where the first presents the fundamentals of shock physics as it pertains to the equation of state, compaction, and strength properties of porous materials. Building on these fundamentals, the next section examines several applications where dynamic processes involving initially porous materials are prevalent, focusing on the areas of penetration, planetary impact, and reactive munitions. The final section provides a look at emerging areas in the field, where the expansion of experimental and computational capabilities are opening the door for new opportunities in the areas of advanced light sources, molecular dynamics modeling, and additively manufactured porous structures. By intermixing experiment, theory, and simulation throughout, this book serves as an excellent, up-to-date desk reference for those in the field of shock compression science of porous and granular materials.
Author: Kolumban Hutter
Publisher: Springer Science & Business Media
ISBN: 3540365656
Category : Technology & Engineering
Languages : en
Pages : 430
Get Book Here
Book Description
A "Sonderforschungsbereich" (SFB) is a programme of the "Deutsche For schungsgemeinschaft" to financially support a concentrated research effort of a number of scientists located principally at one University, Research La boratory or a number of these situated in close proximity to one another so that active interaction among individual scientists is easily possible. Such SFB are devoted to a topic, in our case "Deformation and Failure in Metallic and Granular M aterialK' , and financing is based on a peer reviewed proposal for three (now four) years with the intention of several prolongations after evaluation of intermediate progress and continuation reports. An SFB is terminated in general by a formal workshop, in which the state of the art of the achieved results is presented in oral or I and poster communications to which also guests are invited with whom the individual project investigators may have collaborated. Moreover, a research report in book form is produced in which a number of articles from these lectures are selected and collected, which present those research results that withstood a rigorous reviewing pro cess (with generally two or three referees). The theme deformation and failure of materials is presented here in two volumes of the Lecture Notes in Applied and Computational Mechanics by Springer Verlag, and the present volume is devoted to granular and porous continua. The complementary volume (Lecture Notes in Applied and Com putational Mechanics, vol. 10, Eds. K. HUTTER & H.
Author: Thorsten Pöschel
Publisher: Springer Science & Business Media
ISBN: 3540414584
Category : Science
Languages : en
Pages : 454
Get Book Here
Book Description
"Granular Gases" are diluted many-particle systems in which the mean free path of the particles is much larger than the typical particle size, and where particle collisions occur dissipatively. The dissipation of kinetic energy can lead to effects such as the formation of clusters, anomalous diffusion and characteristic shock waves to name but a few. The book is organized as follows: Part I comprises the rigorous theoretical results for the dilute limit. The detailed properties of binary collisions are described in Part II. Part III contains experimental investigations of granular gases. Large-scale behaviour as found in astrophysical systems is discussed in Part IV. Part V, finally, deals with possible generalizations for dense granular systems.
Author: Iker Zuriguel
Publisher: Springer Nature
ISBN: 3030559734
Category : Science
Languages : en
Pages : 611
Get Book Here
Book Description
This book gathers contributions on a variety of flowing collective systems. While primarily focusing on pedestrian dynamics, they also reflect the latest developments in areas such as vehicular traffic and granular flows and address related emerging topics such as self-propelled particles, data transport, swarm behavior, intercellular transport, and collective dynamics of biological systems. Combining fundamental research and practical applications in the various fields discussed, the book offers a valuable asset for researchers and practitioners alike.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 500
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Get Book Here
Book Description
