18 research outputs found
The study of thermocapillary deformation and rupture in horizontal water layer by confocal laser scanning microscopy
ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ ΡΡΡΠ΅ΠΊΡ ΡΠ΅ΡΠΌΠΎΠΊΠ°ΠΏΠΈΠ»Π»ΡΡΠ½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΈ ΡΠ°Π·ΡΡΠ²Π° ΡΠΎΠ½ΠΊΠΎΠ³ΠΎ Π³ΠΎΡΠΈΠ·ΠΎΠ½ΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΠΎΡ Π²ΠΎΠ΄Ρ Π½Π° ΡΠ°ΠΏΡΠΈΡΠΎΠ²ΠΎΠΉ ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠ΅ Ρ Π»ΠΈΠ½Π΅ΠΉΠ½ΡΠΌ ΡΠ΅Π·ΠΈΡΡΠΈΠ²Π½ΡΠΌ Π½Π°Π³ΡΠ΅Π²Π°ΡΠ΅Π»Π΅ΠΌ ΠΈΠ· ΠΎΠΊΡΠΈΠ΄Π° ΠΈΠ½Π΄ΠΈΡ (Π² Π²ΠΈΠ΄Π΅ Π½Π°ΠΏΡΠ»Π΅Π½Π½ΠΎΠΉ Π΄ΠΎΡΠΎΠΆΠΊΠΈ ΡΠΎΠ»ΡΠΈΠ½ΠΎΠΉ 0.5 ΠΌΠΊΠΌ, ΡΠΈΡΠΈΠ½ΠΎΠΉ 0.5 ΠΈ Π΄Π»ΠΈΠ½ΠΎΠΉ 40 ΠΌΠΌ). ΠΠ»Ρ Π²ΡΡΠΎΠΊΠΎΡΠΎΡΠ½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΡΠΎΠ»ΡΠΈΠ½Ρ ΡΠ»ΠΎΡ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΡΡ Π»Π°Π·Π΅ΡΠ½ΡΠΉ ΡΠΊΠ°Π½ΠΈΡΡΡΡΠΈΠΉ ΠΊΠΎΠ½ΡΠΎΠΊΠ°Π»ΡΠ½ΡΠΉ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π³Π»ΡΠ±ΠΈΠ½Π° ΡΠ΅ΡΠΌΠΎΠΊΠ°ΠΏΠΈΠ»Π»ΡΡΠ½ΠΎΠΉ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅ΡΡΡ ΠΏΡΡΠΌΠΎ ΠΏΡΠΎΠΏΠΎΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΠΎ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ Π½Π°Π³ΡΠ΅Π²Π°. ΠΡΠ΄Π²ΠΈΠ½ΡΡΠΎ ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠ΅, ΡΠΎΠ³Π»Π°ΡΠ½ΠΎ ΠΊΠΎΡΠΎΡΠΎΠΌΡ ΡΠ°Π·ΡΡΠ² ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ ΠΏΠΎΡΠ»Π΅ ΡΠΎΠ³ΠΎ, ΠΊΠ°ΠΊ Π² ΡΡΠΎΠ½ΡΠ°ΡΡΠ΅ΠΌΡΡ ΡΠ»ΠΎΠ΅ ΠΆΠΈΠ΄ΠΊΠΎΡΡΠΈ ΠΏΠΎΠ΄ ΡΠ΅ΡΠΌΠΎΠΊΠ°ΠΏΠΈΠ»Π»ΡΡΠ½ΡΠΌ ΡΠ³Π»ΡΠ±Π»Π΅Π½ΠΈΠ΅ΠΌ ΠΎΠ±ΡΠ΅ΠΌΠ½Π°Ρ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΡ ΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° Π΄ΠΎΡΡΠΈΠ³Π°Π΅Ρ ΠΏΠΎΡΠΎΠ³ΠΎΠ²ΠΎΠ³ΠΎ Π·Π½Π°ΡΠ΅Π½ΠΈΡ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΠΌΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠΌ ΡΠ²ΠΎΠΉΡΡΠ² ΠΆΠΈΠ΄ΠΊΠΎΡΡΠΈ ΠΈ ΠΏΠΎΠ΄Π»ΠΎΠΆΠΊΠΈ.The effect of thermocapillary deformation and rupture of a thin horizontal water layer on the sapphire substrate with lineal resistance heater from indic oxide (in the form of deposited path with thickness of 0.5 Ρm, width of 0.5 mm and length of 40 mm) is experimentally investigated. For high-precision measurements of the layer thickness, the laser scanning confocal microscope is applied. It is found that the depth of the thermocapillary deformation increases directly proportional to the heat capacity. It is suggested that the rapture occurs when in a thinning liquid layer under thermocapillary deepening space density of heat flow reaches a threshold value determined by a complex of liquid and substrate properties
The influence of microstructured surfaces and liquid pulsations on increasing heat transfer in a minichannel
The paper compares two methods for improving the intensification of heat transfer during boiling in a rectangular minichannel. Studies were carried out of the influence of additive structures on the crisis of heat transfer in a minichannel with a two-phase flow, as well as studies of the influence of high-frequency pulsations of liquid flow on the intensification of heat transfer processes during flow boiling