It follows from Figure 3 that the rapid growth of the increment 𝜈effνeff at electric fields and altitudes slightly exceeding the critical levels quickly transfers into the mode of smoother growth. The bigger the altitude AMSL is, the smaller the rate of 𝜈effνeff increment. This feature...
This tool was implemented as an attractive force field, of limited range, influencing the virtual pollutant particles so as to pull them towards the tool. The representation chosen for this technique is the least faithful among the other tools. Instead of considering a graphical representation of ...
Although planes are structurally quite capable of take significant G-force loading, the time period which they occur over is critical too. Smooth parabolic test flights of G-force loading is certainly much different than the sudden snaps that occur when flying through a rough storm. In comparison...
The buoyant force tends to move air pockets upward while drag tugs air in the direction of the flow. Since these forces act in the same direction in upward-sloping segments, air here naturally moves downstream. By contrast, in horizontal or descending pipes, a minimum water velocity must be ...
such that sampling of gaseous and particulate matter pollutants is done before the propellers of the UAV mix or disperse the plume. The air is deflected by the action of the UAV propellers in motion, when producing lift, and this is called the downwash and upwash effect. It is the transpor...
Numbers at the top of the graphs refer to the various phases of the experiment: (1) room under ambient atmospheric conditions; (2) introduction and mixing of pollutants into the room (mixing phase); (3) activation of the cleaning device (removal phase); (4) end of the removal phase; ...
In addition, the 𝑓𝑎𝑣𝑔favg significantly increased with an increment in the relative height of the rectangular rib for a given relative pitch and 𝑅𝑒Re. The reason for this is that the higher relative height in the air channel leads to more interruptions in the air flow path....
While sea spray can significantly impact air–sea heat fluxes, the effect of spray produced by the interaction of wind and waves is not explicitly addressed in current operational numerical models. In the present work, the thermal effects of the sea spray were investigated for an idealized tropica...
The experimental equipment included a DJI Matrice 600 Pro six-rotor UAV, used as the flight platform. Equipped with a LiAir V LiDAR system, it relies on the global navigation satellite system (GNSS) ground-based station to carry out system positioning. A DJI Phantom 3 Pro was used as a co...
The cooling performance of the porous pavement was deeply studied; this can provide a reference for the promotion and application of porous asphalt pavements. The objective of this study was to evaluate the cooling effect of porous asphalt concrete (PAC) pavements (compared with dense-graded ...