Browsing by Subject "Fluid dynamics"
Now showing items 1-20 of 23
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Article
Analytic models of heterogenous magnetic fields for liquid metal flow simulations
(2009)A physically consistent approach is considered for defining an external magnetic field as needed in computational fluid dynamics problems involving magnetohydrodynamics (MHD). The approach results in simple analytical ...
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Conference Object
Computational study of the Kuramoto-Sivashinsky equation
(Soc for Industrial & Applied Mathematics Publ, 1996)We report the results of extensive numerical experiments on the Kuramoto-Sivashinsky equation in the strongly chaotic regime as the viscosity parameter is decreased and increasingly more linearly unstable modes enter the ...
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Doctoral Thesis Open Access
Extensions to structure-based turbulence theory and models, with applications to internal and simple biological flows
(Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2016-12)Η Θεωρία Δομής της Τύρβης (ΘΔΤ) αποτελεί ένα ολοκληρωμένο μαθηματικό πλαίσιο, όπου η ποσοτικοποίηση των ποικίλων πτυχών των συνεκτικών δομών της τύρβης επιτυγχάνεται μέσω των Τανυστών Δομής της Τύρβης (ΤΔΤ). Αυτή η θεωρία ...
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Article
Hydrophilic, cationic large-core star polymers and polymer networks: Synthesis and physicochemical characterization
(2008)Group transfer polymerization was used to prepare hydrophilic, cationic large-core star polymers (LCSPs) and networks of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and ethylene glycol dimethacrylate (EGDMA) in a two-step ...
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Article
Identification and reconstruction of a small leak zone in a pipe by a spectral element method
(2006)This paper deals with the identification of a zone permitting fluid to leak out of a drain. Using the analogy with crack identification by boundary measurements, we give uniqueness and stability results and we propose an ...
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Doctoral Thesis Open Access
In silico studies for the prediction of regional aerosol deposition in the human airways
(Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2018-10)Η πρόβλεψη των χαρακτηριστικών της σωματιδιακής εναπόθεσης στους αεραγωγούς του ανθρωπίνου πνεύμονα αποτελεί χρήσιμη πληροφορία στην ανάπτυξη εισπνεόμενων φαρμάκων αλλά και για την αξιολόγηση των επιπτώσεων στην ανθρώπινη ...
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Article
Large Eddy Simulation of near-bed pipelines in oscillatory flow
(2018)A series of unsteady, three-dimensional numerical simulations of the incompressible, oscillatory flow around a near-bed pipeline is presented. A flow at Reynolds number equal to Reαo=20,000 with respect to the oscillatory ...
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Article
The method of fundamental solutions for axisymmetric acoustic scattering and radiation problems
(1998)The method of fundamental solutions (MFS) is applied to acoustic scattering and radiation for axisymmetric bodies and boundary conditions. The fundamental solution of the governing equation and its normal derivative, which ...
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Article
MHD flow past a circular cylinder using the immersed boundary method
(2010)The immersed boundary method (IB hereafter) is an efficient numerical methodology for treating purely hydrodynamic flows in geometrically complicated flow-domains. Recently Grigoriadis et als. [1] proposed an extension of ...
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Article
Microstructure-based, multiscale modeling for the mechanical behavior of hydrated fiber networks
(2008)A multiscale formulation is derived for the mechanics of a dilute fiber network microstructure, as occurs in in vitro reconstituted collagen gels, to accommodate the deterministic solution of a uniform-stress condition in ...
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Doctoral Thesis Open Access
Modelling of fluid driven fractures in cohesive poroelastoplastic formations
(Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2011-05)Το πρόβλημα της υδραυλικής ρωγμής συναντάται στη τεχνική της υδραυλικής θραύσης, που εφαρμόζεται από την πετρελαϊκή βιομηχανία για την αύξηση της ανάκτησης υδρογονανθράκων. Κατά την εφαρμογή της τεχνικής, προσοχή δίδεται ...
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Article
A note on the convergence rate of the finite element method for singularly perturbed problems using the Shishkin mesh
(2003)We consider the numerical approximation of singularly perturbed problems by the h version of the finite element method on a piecewise uniform, Shishkin mesh. It is well known that this method yields uniform approximations, ...
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Doctoral Thesis Open Access
Numerical simulations of compressible generalized newtonian flows
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2009-01)Στη παρούσα διατριβή μελετήσαμε με αριθμητικές μεθόδους και μεθόδους διαταραχών ς συμπιεστές Νευτώνειες και γενικευμένες Νευτώνειες ροές. Αρχικά, μελετήσαμε αριθμητικά την χρονομεταβαλλόμενη συμπιεστή εκβολή ρευστού Carreau ...
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Doctoral Thesis Open Access
Numerical study of thermally-driven flows with variable properties
(Πανεπιστήμιο Κύπρου, Πολυτεχνική Σχολή / University of Cyprus, Faculty of Engineering, 2019-07)Οι ροές φυσικής συναγωγής μπορούν να θεωρηθούν προσεγγιστικά ως ροές με σταθερές ιδιότητες μόνο όταν οι θερμοκρασιακές διαφορές είναι σχετικά μικρές. Σε τέτοιες περιπτώσεις, η προσέγγιση Oberbeck-Boussinesq ...
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Article
On the analogy between streamlined magnetic and solid obstacles
(2009)Analogies are elaborated in the qualitative description of two systems: the magnetohydrodynamic (MHD) flow moving through a region where an external local magnetic field (magnetic obstacle) is applied and the ordinary ...
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Article
On the transition to turbulence of a viscoplastic fluid past a confined cylinder: A numerical study
(2015)Three-dimensional direct numerical simulations of a Bingham fluid flowing past a confined circular cylinder have been used in order to investigate viscoplastic effects in the wake-transition regime. The case of a cylinder ...
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Article
Perturbation solutions of Poiseuille flows of weakly compressible Newtonian liquids
(2009)Both the planar and axisymmetric isothermal Poiseuille flows of weakly compressible Newtonian liquids with constant shear and bulk viscosities are solved up to the second-order. A linear equation of state is assumed and a ...
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Book
Principles of fluid mechanics
(Prentice Hall, 2001)
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Conference Object
Sedimentation of heavy crystal particles under microgravity conditions
(American Institute of Aeronautics and Astronautics Inc, AIAA, 1998)Crystals grown from specially prepared liquid solutions have important industrial applications such as in biochemical processes, refining etc. The efficiency of these crystals is usually a function of their size. Therefore, ...
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Article
Stability of the annular Poiseuille flow of a Newtonian liquid with slip along the walls
(2009)The annular Poiseuille flow a Newtonian fluid is studied assuming that slip occurs along the walls. Different slip models relating the wall shear stress to the slip velocity are employed. In the case of non-monotonic slip ...