Browsing by Author "Alexandrou, Andreas N."
Now showing items 120 of 101

Conference Object
3D flow of HerschelBulkley fluids
Burgos, Gilmer R.; Alexandrou, Andreas N. (ASME, 1998)The flow of HerschelBulkley fluids through a sudden 3D square with expansion height ratio of 2:1 is studied numerically by solving the mass and momentum conservation equations along with a continuous constitutive relation. ...

Article
An analysis of laminar fluid flow in porous tube and shell systems
Pangrle, B. J.; Alexandrou, Andreas N.; Dixon, A. G.; Dibiasio, D. (1991)The finite element method was used to study steady, incompressible, laminar flow in porous tube systems. The NavierStokes equations were used to describe the flow phenomena in the tube and shell space while the continuum ...

Article
Breakup of a capillary bridge of suspensions
Alexandrou, Andreas N.; Bazilevskii, A. V.; Entov, V. M.; Rozhkov, A. N.; Sharaf, A. (2010)The breakup of liquid bridges under the action of capillary forces is used for studying the rheology of suspensions under stretching. The experiments were performed with suspensions of finegrained (330 μm) sand in glycerin ...

Article
Cessation of the liddriven cavity flow of Newtonian and Bingham fluids
Syrakos, A.; Georgiou, G. C.; Alexandrou, Andreas N. (2016)We provide benchmark results for a transient variant of the liddriven cavity problem, where the lid motion is suddenly stopped and the flow is left to decay under the action of viscosity. Results include Newtonian as well ...

Article
Cessation of the liddriven cavity flow of Newtonian and Bingham fluids
Syrakos, A.; Georgiou, Georgios C.; Alexandrou, Andreas N. (2016)We provide benchmark results for a transient variant of the liddriven cavity problem, where the lid motion is suddenly stopped and the flow is left to decay under the action of viscosity. Results include Newtonian as well ...

Conference Object
Compression molding of semiconcentrated fiber suspensions: Flow and fiber orientation
Ahmed, Alauddin; Alexandrou, Andreas N. (Publ by ASME, 1993)The focus of this paper is compression molding of semiconcentrated fiber suspensions. During compression molding a premeasured amount of raw material (charge) is placed between two halves of a die. The die is then closed ...

Article
Compression molding using a generalized eulerian–lagrangian formulation with automatic remeshing
Ahmed, A.; Alexandrou, Andreas N. (1992)A generalized Eulerian‐Lagrangian approach is used to study the compression molding of viscoelastic polymers. The complete, unsteady, two‐dimensional equations of motion are used in the analysis. The White–Metzner model ...

Article
Correction: Arsalis A.
Arsalis, A.; Alexandrou, Andreas N.; Georghiou, George E. (2017)

Article
Correction: Arsalis A.; Alexandrou, A.N.; Georghiou, G.E. Thermoeconomic modeling and parametric study of a photovoltaicassisted 1 MWe combined cooling, heating, and power system. Energies 2016, 9, 663 DOI: 10.3390/en9080663
Arsalis, A.; Alexandrou, Andreas N.; Georghiou, George E. (2017)

Article
Design and modeling of 110 MWe liquefied natural gasfueled combined cooling, heating and power plants for building applications
Arsalis, A.; Alexandrou, Andreas N. (2015)Decentralized, liquefied natural gasfueled, trigeneration plants are considered as alternatives to centralized, electricityonly generating power plants to improve efficiency and minimize running costs. The proposed system ...

Article
Determination of the rheological parameters of selfcompacting concrete matrix using slump flow test
Neophytou, Marina K. A.; Pourgouri, Stella; Kanellopoulos, Antonios; Petrou, Michael F.; Ioannou, Ioannis; Georgiou, Georgios; Alexandrou, Andreas N. (2010)

Article
Determination of the rheological parameters of selfcompacting concrete matrix using slump flow test
Neophytou, Marina K. A.; Pourgouri, Stella; Kanellopoulos, Antonios D.; Petrou, Michael F.; Ioannou, Ioannis; Georgiou, Georgios C.; Alexandrou, Andreas N. (2010)The classification of a concrete mixture as selfcompacting (SCC) is performed by a series of empirical characterization tests that have been designed to assess not only the flowability of the mixture but also its segregation ...

Article
Determination of the rheological parameters of selfcompacting concrete matrix using slump flow test
Neophytou, Marina K. A.; Pourgouri, S.; Kanellopoulos, A. D.; Petrou, Michael F.; Ioannou, I.; Georgiou, G.; Alexandrou, Andreas N. (2010)The classification of a concrete mixture as selfcompacting (SCC) is performed by a series of empirical characterization tests that have been designed to assess not only the flowability of the mixture but also its segregation ...

Article
Determination of the rheological parameters of selfcompacting concrete matrix using slump flow test
Neophytou, Marina K. A.; Pourgouri, Stella; Kanellopoulos, Antonios; Petrou, Michael F.; Ioannou, Ioannis; Georgiou, Georgios; Alexandrou, Andreas N. (2010)

Article
Determining true material constants of semisolid slurries from rotational rheometer data
Alexandrou, Andreas N.; Georgiou, Georgios C.; Economides, Eva Athena; Modigell, M. (2016)In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of HerschelBulkley fluids. We first show how true constants can be obtained ...

Article
Determining true material constants of semisolid slurries from rotational rheometer data
Alexandrou, Andreas N.; Georgiou, G. C.; Economides, E. A.; Modigell, M. (2016)In this work we revisit the issue of obtaining true material constants for semisolid slurries. Therefore, we consider the circular Couette flow of HerschelBulkley fluids. We first show how true constants can be obtained ...

Article
Determining true material constants of viscoplastic materials from rotational rheometer data
Alexandrou, Andreas N.; Georgiou, Georgios C.; Economides, EvaAthena; Zang, Christoph; Modigell, Michael (2018)We analyse the circular Couette flow of Herschel–Bulkley fluids to investigate the validity of the assumption that the rate of strain distributions across the gap share a common point. It is demonstrated that this is true ...

Book Chapter
Effective utilization of liquefied natural gas for distributed generation
Arsalis, A.; Alexandrou, Andreas N. (Nova Science Publishers, Inc., 2015)Liquefied natural gas (LNG) is considered a safe and transportable fuel and could become a fueling option for distributed generation applications, particularly in locations which are situated far from centralized power ...

Conference Object
Effects of periodic gravity modulation in microgravity convection systems
Cyr, Martha N.; Alexandrou, Andreas N.; Olinger, D. J. (Publ by ASME, 1993)Natural convection in an enclosure that is subjected to periodic excitations is investigated using a classical mixed Galerkin finite element method. The modulation is incorporated in the momentum equations, through a ...

Article
Firstpassage study and stationary response analysis of a BWB hysteresis model using quasiconservative stochastic averaging method
Noori, M.; Dimentberg, M.; Hou, Z.; Christodoulidou, R.; Alexandrou, Andreas N. (1995)The quasiconservative stochastic averaging (QCSA) method is applied to a BoucWenBaber hysteretic system (BWB) under Gaussian white noise excitations. The stationary probability density of the system's response amplitude ...