Keyword: «temperature field»

Fragments of constructional climatology, viewed as the issues forming microclimate of the premises and providing for the conditions of daily life activities comfortable for people are considered. This approach taken within the frames of the course «Molecular Physics» may promote more respectable attitude of the students of Civil Engineering Faculty to Physics as a school subject.

Modeling of an electrothermal process in temperature field estimating is considered through the example of one-dimensional thermal conductivity. The use of this technique is justified by the need to consider initial and boundary conditions if mathematical tools are used. This circumstance complicates the process of obtaining analytical solutions and in some cases makes it impossible. The presented type of heat processes modeling is based on similarity of equations which describe thermal and electrical processes thus allowing us to recalculate the potential distribution obtained in modeling into the actual value of retaining walls temperature field.

A laboratory stand has been developed for conducting microwave radiation on building materials, these are red and refractory bricks. The effect of microwave radiation at a frequency of 2. GHz with a power ranging from 200 to 1000 W on the thermophysical properties of building materials has been investigation All temperature, geometric data were obtained by calibrated sensors. The thermophysical properties of the samples were obtained by a nonstationary mode of pulsed microwave radiation, and the results were calibrated with existing devices in a stationary mode.

The paper considers the possibility of using local low-temperature loading during AE control. This method is based on the creation of a local stress-strain state, which is formed when a gradient temperature field is applied to an object using carbon dioxide in the form of "dry snow". Signals from acts of acoustic emissions emanating from the tip of an artificially applied crack on a thin-walled plate were processed and investigated. Theoretical values of the stress intensity coefficient for a defect under local low-temperature loading are calculated. It is shown that with the method of local low-temperature loading, a power dependence of the number of acts on the stress intensity coefficient is observed.

The paper proposes a study of the thermal process in a radial self-lubricating polymer sliding bearing operating in a swinging motion mode. The thermal process in a sliding bearing is described by a three-dimensional heat conduction equation in cylindrical coordinates. The technique for determining the kinematic conditions is proposed on the basis of a numerical analysis of the temperature field in the contact zone of the shaft and the bearing, under which the mathematical model of the thermal process must take into account the speed of the shaft. The results obtained can be used in thermal diagnostics of friction in real sliding bearings.