Two-dimensional anomalies of heat conductivity. A refraction of a thermal stream

you are: Two-dimensional anomalies of heat conductivity

The stationary current of heat through some semispace to a cold isothermal surface will be homogeneous, i.e. One-dimensional in all considered area, in that and only that case if this surface flat, and any changes of heat conductivity in the given volume occur in the flat layers parallel to this surface, i.e. Perpendicular to a direction of a thermal stream.

In relation to real areas of researches the first condition (the limiting surface - flat) usually is not carried out, i.e. There is a considerable relief and as it was specified above, it is necessary to enter the topographical amendment. We concern here the second condition which if natural variations of heat conductivity are connected with litologiej, is reached, possibly, only in extensive areas with horizontal zaleganiem layers. Tectonic movements lead usually to more difficult distribution of different types of breeds (so, and heat conductivity), that is connected with skladkoobrazovaniem, with explosive infringements or with introduction izverzhennyh breeds. Even in the rather poorly deformed areas processes osadkonakoplenija and diagenesis create lateralnye litologicheskie heterogeneity.

Which of these geometrical complications causes indignation of a thermal field, depends on what lateralnye litologicheskie distinctions lead lateralnym to heat conductivity changes. It means, for example, that the thickness of dolomite crumpled in folds and sandstones can cause rather small indignations as for both types of breeds the same heat conductivity is characteristic. On the contrary, a folded series of quartzites and clay breeds will cause appreciable effect as clay have considerably smaller heat conductivity, than quartzites. If to exclude extreme members of a number, i.e. Stone salt and coal it is visible, that values of factor of heat conductivity are usually concluded in an interval between 1,5 and 3,5 Vt / (м*К). In following section we analyze refraktsionnyj the effect arising at such distinction of factors of heat conductivity.