Motion of self-rewetting drop on a substrate with a constant temperature gradient

2021 ◽  
Vol 915 ◽  
Author(s):  
Ze-Lai Xu ◽  
Jun-Yuan Chen ◽  
Hao-Ran Liu ◽  
Kirti Chandra Sahu ◽  
Hang Ding
Keyword(s):  
Temperature Gradient ◽  
Constant Temperature ◽  
Constant Temperature Gradient

Abstract

scholarly journals Snowbreeder 5: a Micro-CT device for measuring the snow-microstructure evolution under the simultaneous influence of a temperature gradient and compaction

2017 ◽  
Vol 63 (238) ◽  
pp. 355-360 ◽  
Author(s):  
MAREIKE WIESE ◽  
MARTIN SCHNEEBELI
Keyword(s):  
Temperature Gradient ◽  
Constant Temperature ◽  
Snow Sample ◽  
Micro Computed Tomography ◽  
Peltier Element ◽  
Constant Temperature Gradient ◽  
New Device ◽  
Isothermal Conditions ◽  
Snow Metamorphism ◽  
Simultaneous Influence

ABSTRACTThe instrumented sample holder Snowbreeder 5 is used to investigate the simultaneous influence of settlement on temperature-gradient snow metamorphism in time-lapse micro-computed tomography experiments. So far, experiments have only been done on temperature-gradient snow metamorphism without settlement or settlement under isothermal conditions. With the new device we can impose a constant temperature gradient on a snow sample and induce settlement by placing a passive load on top of the snow sample. The weight of the load can be varied, simulating various snow heights on top of the snow sample. Snow-temperature measurements on the passive load are possible due to wireless data transfer via Bluetooth. The temperature gradient is set by controlling the air temperature inside the computer tomograph and by a Peltier element at the bottom of the snow sample. First experiments under isothermal conditions and a constant temperature gradient of 43 K m−1 showed that the settlement was reduced to almost half as soon as a temperature gradient was applied under otherwise almost equal snow conditions. The compactive viscosity in the isothermal experiment was in the range of literature values.

INFLUENCE OF GROWTH RATE ON MICROSTRUCTURE AND MICROINDENTATION HARDNESS OF DIRECTIONALLY SOLIDIFIED TIN–CADMIUM EUTECTIC ALLOY

2009 ◽  
Vol 16 (02) ◽  
pp. 191-201 ◽  
Author(s):  
E. ÇADIRLI ◽  
H. KAYA ◽  
M. GÜNDÜZ
Keyword(s):  
Growth Rate ◽  
Temperature Gradient ◽  
Directional Solidification ◽  
Constant Temperature ◽  
Eutectic Alloy ◽  
Directionally Solidified ◽  
Constant Temperature Gradient ◽  
Microindentation Hardness ◽  
Solidification Furnace ◽  
Eutectic Melt

Sn – Cd eutectic melt was first obtained in a hot filling furnace and then directionally solidified upward with different growth rate ranges (8.1–165 μm/s) at a constant temperature gradient G (4.35 K/mm) in the Bridgman-type directional solidification furnace. The lamellar spacings (λ) were measured from both transverse and longitudinal sections of the samples. The influence of the growth rate (V) on lamellar spacings (λ) and undercoolings (Δ T) was analyzed. λ2V, ΔTλ and ΔTV-0.5 values were determined by using λ,ΔT and V values. Microindentation hardness (HV) was measured from both transverse and longitudinal sections of the specimens. HV values increase with the increasing values of V but decrease with increasing λ values. λ-V, λ - ΔT and λ2V results have been compared with the Jackson–Hunt eutectic model and similar experimental results, HV - V and HV - λ results were also compared with the previous work.

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