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Informationen zum Autor Vinko Jovic, University of Split, Croatia Vinko Jovic is a Professor and the Head of Department for Hydraulics and Hydromechanics in the Faculty of Civil Engineering at the University of Split. His research interests also include numerical modelling. He has circa 60 published papers and has written two books in Croatian. He is the creator of a software package called Simpip (an abbreviation of simulation of pipe flow) which is used for solving non-steady pipe flow using the finite element method. Klappentext Analysis and Modelling of Non-Steady Flow in Pipe and Channel Networks deals with flows in pipes and channel networks from the standpoints of hydraulics and modelling techniques and methods. These engineering problems occur in the course of the design and construction of hydroenergy plants, water-supply and other systems. In this book, the author presents his experience in solving these problems from the early 1970s to the present day. During this period new methods of solving hydraulic problems have evolved, due to the development of computers and numerical methods.This book is accompanied by a website which hosts the author's software package, Simpip (an abbreviation of simulation of pipe flow) for solving non-steady pipe flow using the finite element method. The program also covers flows in channels. The book presents the numerical core of the SimpipCore program (written in Fortran).Key features:* Presents the theory and practice of modelling different flows in hydraulic networks* Takes a systematic approach and addresses the topic from the fundamentals* Presents numerical solutions based on finite element analysis* Accompanied by a website hosting supporting material including the SimpipCore project as a standalone programAnalysis and Modelling of Non-Steady Flow in Pipe and Channel Networks is an ideal reference book for engineers, practitioners and graduate students across engineering disciplines. Zusammenfassung Analysis and Modelling of Non-Steady Flow in Pipe and Channel Networks deals with flows in pipes and channel networks from the standpoints of hydraulics and modelling techniques and methods. These engineering problems occur in the course of the design and construction of hydroenergy plants, water-supply and other systems. Inhaltsverzeichnis Preface xiii 1 Hydraulic Networks 1 1.1 Finite element technique 1 1.1.1 Functional approximations 1 1.1.2 Discretization, finite element mesh 3 1.1.3 Approximate solution of differential equations 6 1.2 Unified hydraulic networks 21 1.3 Equation system 23 1.3.1 Elemental equations 23 1.3.2 Nodal equations 24 1.3.3 Fundamental system 25 1.4 Boundary conditions 28 1.4.1 Natural boundary conditions 28 1.4.2 Essential boundary conditions 30 1.5 Finite element matrix and vector 30 Reference 36 Further reading 36 2 Modelling of Incompressible Fluid Flow 37 2.1 Steady flow of an incompressible fluid 37 2.1.1 Equation of steady flow in pipes 37 2.1.2 Subroutine SteadyPipeMtx 40 2.1.3 Algorithms and procedures 42 2.1.4 Frontal procedure 45 2.1.5 Frontal solution of steady problem 51 2.1.6 Steady test example 57 2.2 Gradually varied flow in time 59 2.2.1 Time-dependent variability 59 2.2.2 Quasi non-steady model 60 2.2.3 Subroutine QuasiUnsteadyPipeMtx 61 2.2.4 Frontal solution of unsteady problem 63 2.2.5 Quasi-unsteady test example 65 2.3 Unsteady flow of an incompressible fluid 65 2.3.1 Dynamic equation 65 2.3.2 Subroutine RgdUnsteadyPipeMtx 68 2.3.3 Incompressible fluid acceleration 69 2.3.4 Acceleration test 72 2.3.5 Rigid test example 72 References 75 Further Reading 75 3 Natural Boundary Condition Ob...
