With increasing wind velocity, the density of the wind-drift sand increased steadily; however, at a certain critical value, the density surged.
Perhaps a better comparison is to the density of energetic particles that come from the Sun and hit the Earth, called the Solar Wind; the density of the Solar Wind is about 1 million particles per cubic metre.
Wind characteristics, e.g., the mean wind speed, turbulence intensity, gust factor and power spectral density including the evolutionary power spectral density (EPSD) of the wind were evaluated.
We present and illustrate the simulation results of a cellular automata model describing the dynamics of a forest fire spread on a mountainous landscape taking into account factors such as the type and density of vegetation, the wind speed and direction and the spotting phenomenon.
In a classroom with an occupancy density of 1.8 m2/person, the wind tower with rotary thermal wheel was experimentally shown to provide 9 L/s per person at an inlet air velocity of 3 m/s, 1 L/s per person higher than recommended ventilation rates.
With an air density of 1.1 kg/m3, the wind energy intensity perpendicular to the wind directions ranges between 4.4 W/m at the coastal areas and 53.2 W/m at the far northern region of Nigeria [33].
With an air density of 1.1 kg/m3, the wind energy intensity perpendicular to the wind direction ranges between 4.4 W/m2 at the coastal areas and 35.2 W/m2 at the far northern region [18].
In this latter context, it is proposed to linearize the aerodynamic coefficient by the least-square method, using the probability density function of the wind incidence as a weighting function.
Step 2: Split the probability density functions of the wind equally at hour t, according to the required accuracy.
