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FLUENT simulations of methane- and heptane-fueled buoyant turbulent diffusion flames are presented. Within the large eddy simulation framework three soot formation models (the one-step model by Khan and Greeves, the two-step model by Tesner et al., and the Moss-Brookes model) combined with three soot oxidation models (Fenimore-Jones, Lee et al. and Magnussen-Hjertager models) are compared. The Moss-Brookes...
Classical thermal theory of piloted ignition is extended by coupling the heat balance at the exposed sample surface and the finite-rate pyrolysis in the material volume. Approximate analytical solutions for the sample temperature are obtained for an arbitrary sample thickness, with the external radiative heating, surface re-radiation, heat of gasification, and the convective heat flux corrected for...
For a long time Wi-Fi has lacked methods for reliable multicast. A great step towards solving this problem has been made with release of the IEEE 802.11aa amendment, which introduces a number of new multicast methods. The amendment claims that reliability of the methods can be increased if transmission is performed in preliminarily reserved time intervals. If a transmitted flow imposes certain Quality...
The increasing amount of audio and video data transmitted over Wi-Fi networks raises a problem of parametrized Quality of Service (QoS) provisioning, which is challenging even for point-to-point transmission. QoS provisioning is much more complicated when a wireless access point (AP) streams IPTV or another multimedia flow to a group of receiving stations. This scenario is a typical use case for IEEE...
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