Browsing by Subject "Fluid dynamics"

Now showing items 1-20 of 23

    • Article  

      Analytic models of heterogenous magnetic fields for liquid metal flow simulations 

      Votyakov, E. V.; Kassinos, Stavros C.; Albets-Chico, X. (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 ...
    • Conference Object  

      Computational study of the Kuramoto-Sivashinsky equation 

      Smyrlis, Yiorgos-Sokratis; Papageorgiou, Demetrios T. (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 ...
    • Doctoral Thesis  Open Access

      Extensions to structure-based turbulence theory and models, with applications to internal and simple biological flows 

      Stylianou, Fotos S. (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 ...
    • Article  

      Hydrophilic, cationic large-core star polymers and polymer networks: Synthesis and physicochemical characterization 

      Kafouris, Demetris; Gradzielski, M.; Patrickios, Costas S. (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 ...
    • Article  

      Identification and reconstruction of a small leak zone in a pipe by a spectral element method 

      Belhachmi, Z.; Karageorghis, Andreas; Taous, K. (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 ...
    • Doctoral Thesis  Open Access

      In silico studies for the prediction of regional aerosol deposition in the human airways 

      Koullapis, Pantelis G. (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 ...
    • Article  

      Large Eddy Simulation of near-bed pipelines in oscillatory flow 

      Fonias, E. N.; Grigoriadis, D. G. E. (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 ...
    • Article  

      The method of fundamental solutions for axisymmetric acoustic scattering and radiation problems 

      Karageorghis, Andreas; Fairweather, G. (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 ...
    • Article  

      MHD flow past a circular cylinder using the immersed boundary method 

      Grigoriadis, D. G. E.; Sarris, I. E.; Kassinos, Stavros C. (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 ...
    • Article  

      Microstructure-based, multiscale modeling for the mechanical behavior of hydrated fiber networks 

      Barocas, V. Η; Chandran, P. L.; Stylianopoulos, T. (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 ...
    • Doctoral Thesis  Open Access

      Modelling of fluid driven fractures in cohesive poroelastoplastic formations 

      Sarris, Ernestos N. (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 ...
    • Article  

      A note on the convergence rate of the finite element method for singularly perturbed problems using the Shishkin mesh 

      Xenophontos, Christos A. (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, ...
    • Doctoral Thesis  Open Access

      Numerical simulations of compressible generalized newtonian flows 

      Taliadorou, Eleni G. (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 ...
    • Doctoral Thesis  Open Access

      Numerical study of thermally-driven flows with variable properties 

      Demou, Andreas D. (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 ...
    • Article  

      On the analogy between streamlined magnetic and solid obstacles 

      Votyakov, E. V.; Kassinos, Stavros C. (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 ...
    • Article  

      On the transition to turbulence of a viscoplastic fluid past a confined cylinder: A numerical study 

      Kanaris, N.; Kassinos, Stavros C.; Alexandrou, Andreas N. (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 ...
    • Article  

      Perturbation solutions of Poiseuille flows of weakly compressible Newtonian liquids 

      Taliadorou, Eleni G.; Neophytou, Marios; Georgiou, Georgios C. (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 ...
    • Book  

      Principles of fluid mechanics 

      Αλεξάνδρου, Ανδρέας Ν (Prentice Hall, 2001)
    • Conference Object  

      Sedimentation of heavy crystal particles under microgravity conditions 

      Alexandrou, Andreas N.; Gatsonis, N. A.; Shi, H.; Sacco, A. (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, ...
    • Article  

      Stability of the annular Poiseuille flow of a Newtonian liquid with slip along the walls 

      Chatzimina, Maria Evangelia; Georgiou, Georgios C.; Housiadas, Kostas D.; Hatzikiriakos, Savvas George (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 ...