This article describes the formula determining the temperature, velocity and force of wind flow around the buildings. The dependence of wind speed and temperature difference, showing the distribution of aerodynamic coefficients on the facade of the building in different directions of wind flow. The basic building envelope and the effect of surface roughness on the flow around buildings.
In the article there were analyzed researches of combustion speed of solid fuel, here are considered common schemes of ball mechanical fire-boxes, is described mine-layered scheme for burning of solid fuel with different characteristics: calorific value, ash content, moisture, volatile matters, fractional part, that are known. Here are analytical equations to calculate the basic parameters of the combustion zone based on a mathematical model of burning solid fuel process in mine-layered fire-boxes with its translational and rotational movement on the grid-iron lattice.