Now showing items 1-6 of 6

  • Finite element modeling of porous solid propellants 

    Xu, F.; Sofronis, P.; Aravas, N.; Namazifard, A.; Fiedler, R. (2005)
    The effect of porosity on the constitutive response of a linearly viscoelastic solid that obeys a constitutive law of the standard differential form is investigated under small strain deformation conditions. It is demonstrated ...
  • Improving the efficiency of insect screens in greenhouses 

    Bartzanas, T.; Fidaros, D.; Baxevanou, C.; Katsoulas, N.; Kittas, C. (2009)
    A CFD code was used in order to study the influence of different types of insect screens on greenhouse microclimate and natural ventilation performance. The validity of the code was checked against experimental data. The ...
  • Pin-assisted resin infiltration of porous substrates 

    Polychronopoulos, N. D.; Papathanasiou, T. D. (2015)
    We analyze computationally the process of pin-assisted resin infiltration of porous substrates. In such a process, a porous substrate is pulled over a staggered array of stationary pins. A wedge-shaped fluid region forms ...
  • A simple model for ventilation rate determination in screenhouses 

    Rigakis, N.; Katsoulas, N.; Teitel, M.; Bartzanas, T.; Kittas, C. (2015)
    The objective of this work was to study and model the ventilation rate in screenhouses. Thus, microclimate variables and crop transpiration as well as the air velocity were measured in three screenhouses covered by different ...
  • Solar radiation distribution in screenhouses: A CFD approach 

    Bartzanas, T.; Katsoulas, N.; Kittas, C. (2012)
    In this paper the effect of solar radiation distribution in a typical screenhouse was numerically investigated, taking into account the thickness and aerodynamic properties of the screen and its spectral, optical and thermal ...
  • Variation in the mechanical properties of a porous multi-phase biofilm under compression due to void closure 

    Laspidou, C. S.; Aravas, N. (2007)
    Biofilm properties change drastically from one point to another inside the matrix, and from one minute to the next, bringing about similar variations in biofilm mechanical properties, both in time and space. In this article, ...