scholarly journals Heat Transfer Measurements with Temperature Oscillation Method

2018 ◽  
Author(s):  
Stanislav Solnař ◽  
Martin Dostál ◽  
Tomáš Jirout
Keyword(s):  
Heat Transfer ◽  
Temperature Oscillation ◽  
Oscillation Method

Experimental Determination of the Effect of Varying the Base Fluid on Static Thermal Conductivity of Nanofluids

2005 ◽  
Author(s):  
S. Nara ◽  
P. Bhattacharya ◽  
P. Vijayan ◽  
W. Lai ◽  
W. Rosenthal ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Theoretical Model ◽  
Base Fluid ◽  
Temperature Oscillation ◽  
Small Particles ◽  
Conductivity Enhancement ◽  
Series Of Experiments ◽  
Oscillation Method

The heat transfer abilities of fluids can be improved by adding small particles of sizes of the order of nanometers. Recently a lot of research has been done in evaluating the thermal conductivity of nanofluids using various nanoparticles. In our present work we address this issue by conducting a series of experiments to determine the effective thermal conductivity of alumina-nanofluids by varying the base fluid with water and antifreeze liquids like ethylene glycol and propylene glycol. Temperature oscillation method is used to find the thermal conductivity of the nanofluid. The results show the thermal conductivity enhancement of nanofluids depends on viscosity of the base fluid. Finally the results are validated with a recently proposed theoretical model.

Synthesis of high-quality AgGaSe2 polycrystalline material by the melt temperature oscillation method

1996 ◽  
Vol 46 (1) ◽  
pp. 100-102 ◽  
Author(s):  
Shi-fu Zhu ◽  
Bei-jun Zhao ◽  
Jun Liu ◽  
Hon-gan Jiang ◽  
Zheng-hui Li ◽  
...  
Keyword(s):  
Polycrystalline Material ◽  
Temperature Oscillation ◽  
High Quality ◽  
Melt Temperature ◽  
Oscillation Method

scholarly journals Vapor growth of doped mercuric iodide crystals by the Temperature Oscillation Method

1977 ◽  
Vol 42 ◽  
pp. 160-165 ◽  
Author(s):  
L. Van Den Berg ◽  
W.F. Schnepple ◽  
C. Ortale ◽  
M. Schieber
Keyword(s):  
Temperature Oscillation ◽  
Mercuric Iodide ◽  
Vapor Growth ◽  
Oscillation Method

Temperature oscillation calorimetry in stirred tank reactors with variable heat transfer

1994 ◽  
Vol 17 (6) ◽  
pp. 406-413 ◽  
Author(s):  
Rüdiger Carloff ◽  
Alexander Proß ◽  
Karl-Heinz Reichert
Keyword(s):  
Heat Transfer ◽  
Temperature Oscillation ◽  
Stirred Tank ◽  
Stirred Tank Reactors ◽  
Variable Heat

scholarly journals APPLICATION OF THE TEMPERATURE OSCILLATION METHOD IN HEAT TRANSFER MEASUREMENTS AT THE WALL OF AN AGITATED VESSEL

2018 ◽  
Vol 58 (2) ◽  
pp. 144 ◽  
Author(s):  
Stanislav Solnař ◽  
Martin Dostál ◽  
Karel Petera ◽  
Tomáš Jirout
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Phase Shift ◽  
Vertical Wall ◽  
Temperature Response ◽  
Temperature Oscillation ◽  
Heat Transfer Surface ◽  
Transfer Coefficients ◽  
Rushton Turbine ◽  
Infra Red

The Temperature Oscillation Infra-Red Thermography (TOIRT) was used to measure convective heat transfer coefficients at the inner vertical wall of an agitated and baffled vessel. Two impellers were used: an axial six-blade impeller with pitched blades and the Rushton turbine. The TOIRT method represents an indirect method based on measuring the phase shift between the oscillating heat flux applied to one side of the heat transfer surface and the wall temperature response monitored by a contactless infra-red camera at the same side. On the basis of this phase shift, the TOIRT method can indirectly evaluate the heat transfer coefficient on the other side of the heat transfer surface. Two forms of experimental results are presented in this paper. The first one describes graphical dependencies of the local Nusselt number on the dimensionless distance from the vessel bottom for various Reynolds numbers. The second form describes the mean Nusselt number along the wall as a function of the Reynolds number.

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