Sfoglia per Autore "Vlachogiannis, M."
Items 1-11 di 11
-
Desalination by mechanical compression of humid air
Vlachogiannis, M.; Bontozoglou, V.; Georgalas, C.; Litinas, G. (1999)A novel desalination concept is described, combining the principles of humidification-dehumidification and mechanical vapor compression. Thermodynamic analysis indicates the effect of operating conditions on water production ... -
Effect of channel width on the primary instability of inclined film flow
Vlachogiannis, M.; Samandas, A.; Leontidis, V.; Bontozoglou, V. (2010)A procedure is developed to detect the onset of interfacial instability in inclined film flows (with estimated accuracy better than 5%) and is used to show that the finite width of experimental channels stabilizes the ... -
Effect of Fluid Properties on Flow Patterns in Two-Phase Gas Liquid Flow in Horizontal and Downward Pipes
Tzotzi, C.; Bontozoglou, V.; Andritsos, N.; Vlachogiannis, M. (2011)This paper investigates the effect of gas density and surface tension on flow pattern transitions in horizontal and near-horizontal pipes. Experiments were conducted at atmospheric conditions in a 12.75-m long pipe with a ... -
The effect of soluble surfactants on liquid film flow
Georgantaki, A.; Vlachogiannis, M.; Bontozoglou, V. (2012)We investigate experimentally the modifications in the dynamics of liquid film flow, resulting from the addition in water of the soluble surfactants iso-propanol (IP) and Sodium Dodecyl Sulfate (SDS). Recent experiments ... -
Experimental evidence for a short-wave global mode in film flow along periodic corrugations
Cao, Z.; Vlachogiannis, M.; Bontozoglou, V. (2013)The primary instability of liquid film flow along periodically corrugated substrates is studied experimentally. Two different wall shapes, of the same wavelength and height, are tested for a wide range of inclinations. It ... -
Experimental study of inclined film flow along periodic corrugations: The effect of wall steepness
Argyriadi, K.; Vlachogiannis, M.; Bontozoglou, V. (2006)Gravity-driven film flow along an inclined periodic wall with transverse rectangular corrugations is studied experimentally. The effect of corrugation steepness (=height/length) is considered in detail and an interesting ... -
Experiments on laminar film flow along a periodic wall
Vlachogiannis, M.; Bontozoglou, V. (2002)Experimental results are reported on the structure of gravity-driven film flow along an inclined periodic wall with rectangular corrugations. A fluorescence imaging method is used to capture the evolution of film height ... -
Measurements of liquid film flow as a function of fluid properties and channel width: Evidence for surface-tension-induced long-range transverse coherence
Georgantaki, A.; Vatteville, J.; Vlachogiannis, M.; Bontozoglou, V. (2011)We study experimentally the influence of the transverse dimension on film flow in relatively wide channels with sidewalls. Large deviations from two-dimensional predictions are observed in the primary instability and in ... -
Nominally two-dimensional waves in inclined film flow in channels of finite width
Leontidis, V.; Vatteville, J.; Vlachogiannis, M.; Andritsos, N.; Bontozoglou, V. (2010)Traveling waves in inclined film flow in channels of finite width are never truly two-dimensional (2D) because of a long-range effect of sidewalls The present study documents the characteristics of the first waves that are ... -
Observations of solitary wave dynamics of film flows
Vlachogiannis, M.; Bontozoglou, V. (2001)Experimental results are reported on non-stationary evolution and interactions of waves forming on water and water-glycerol solution flowing along an inclined plane. A nonlinear wave generation process leads to a large ... -
Solitary waves on inclined films: Flow structure and binary interactions
Malamataris, N. A.; Vlachogiannis, M.; Bontozoglou, V. (2002)The downstream evolution of disturbances, introduced at the inlet of a liquid film flowing along an inclined plane wall, is studied numerically by solving the full, time-dependent Navier-Stokes equation. Computational ...