THE HEAT CAPACITY OF SATURATED LIQUID NITROGEN AND METHANE FROM THE BOILING POINT TO THE CRITICAL TEMPERATURE1

1930 ◽  
Vol 52 (2) ◽  
pp. 622-633 ◽  
Author(s):  
R. Wiebe ◽  
M. J. Brevoort
Keyword(s):  
Heat Capacity ◽  
Liquid Nitrogen ◽  
Boiling Point ◽  
Saturated Liquid

scholarly journals Experimental Cryoablation of Thyroid Gland with Propilthiouracyl-Induced Diffuse Hyperplasiae

2021 ◽  
Vol 31 (2) ◽  
pp. 168-179
Author(s):  
Kostiantyn Pobielienskyi ◽  
◽  
Oleksandr Pakhomov ◽  
Gurina Tetyana Gurina Tetyana ◽  
Liliia Pobielienska ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Thyroid Gland ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Freeze Thaw ◽  
Model Experiments ◽  
Endoscopic Control ◽  
The One ◽  
Benign Nodules

Cryoablation under endoscopic control is considered to be a promising approach in therapy of benign nodules of thyroid gland (TG). However, pathologically altered TG tissue differs in thermal conductivity and heat capacity from normal one, therefore the model experiments in animals are necessary to determine the cryoablation parameters. In this research, the changes of temperature during cryoablation of experimental rat TG under normal conditions and the one with propylthiouracil (PTU)-induced diffuse hyperplasia (DH) were comparatively assessed. TG was cryo-ablated in rats, previously received a 0.1% PTU solution within 90 days, using a copper cryoprobe, cooled to liquid nitrogen temperature. The process was controlled using thermocouples placed at different distances from the iceball. Differences between thermograms of intact TG tissue and the samples with PTU-induced DH were established. To achieve the destruction effect of TG with DH to a depth of more than 1 mm, the need of implementing two freeze-thaw cycles with 120-second cryoprobe exposure was proven.

Stability in the Special Saturated Liquid Film along an Inclined Heated Plate

2012 ◽  
Vol 516-517 ◽  
pp. 202-207
Author(s):  
Xiao Chao Fan ◽  
Rui Jing Shi ◽  
Bo Wei
Keyword(s):  
Reynolds Number ◽  
Boundary Value Problem ◽  
Liquid Film ◽  
Boiling Point ◽  
Boundary Value ◽  
Physical Property ◽  
Wave Number ◽  
Heated Plate ◽  
Saturated Liquid ◽  
Inclined Angle

Stable analysis of flow and heat transfer in the saturated liquid film of liquid low boiling point gases falling down an inclined heated plate is investigated. Firstly, the boundary value problem of linear stability differential equation (Orr–Sommerfeld equation) on small perturbation is derived representing surface tension by nonlinear relationship on temperature. Then, the expression of the wave velocity is got by solving the boundary value problem of O–S equation using the perturbation method. The effects of the inclined angle and some other factors, such as Reynolds number, wave number, temperature of the plate and the parameter for the physical property, on stability in the saturated liquid film of liquid low boiling point gas N2 are numerically analyzed by MATLAB software. Finally, it is shown and analyzed a new critical Reynolds number which is actually the extension of Yih’s.

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