caa a22 4500 606188487 CHVBK 20210128100845.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10891-015-1320-5 doi (NATIONALLICENCE)springer-10.1007/s10891-015-1320-5 Frontal Regime of Heat and Mass Transfer in a Geothermal Bed [Elektronische Daten] [A. Alkhasov, M. Ramazanov, D. Alkhasova] Based on an earlier proposed mathematical model, the conditions for the existence of a frontal regime of steam extraction from a high-temperature bed have been derived. It is shown that unlike the familiar one-dimensional case, in the radial-symmetrical model considered the radius of the region occupied by steam tends to a limiting value, that is, the front of boiling that separates the regions of water and steam practically comes to a stop after a time. A formula has been derived pointing clearly to the dependence of the indicated limiting value of the front radius on the water and steam parameters as well as on the characteristics of the geothermal bed. It is shown that for the steam to occupy a considerable region around the well when the bed is in service, it is necessary that the initial state of water be close to that of steam generation. Otherwise the front of boiling in the considered regime of heat and mass transfer extends from the well only a little. Springer Science+Business Media New York, 2015 steam generation in a bed nationallicence heat and mass transfer nationallicence flow regimes nationallicence radial model nationallicence analytical solution nationallicence Alkhasov A. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut Ramazanov M. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut Alkhasova D. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/6(2015-11-01), 1358-1365 1062-0125 88:6<1358 2015 88 10891 https://doi.org/10.1007/s10891-015-1320-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10891-015-1320-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alkhasov A. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut NATIONALLICENCE 700 1- Ramazanov M. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut NATIONALLICENCE 700 1- Alkhasova D. Institute for Problems of Geothermics, Dagestan Scientific Center of the Russian Academy of Sciences, 39a Shamil′ Ave., 367030, Makhachkala, Russia aut NATIONALLICENCE 773 0- Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/6(2015-11-01), 1358-1365 1062-0125 88:6<1358 2015 88 10891