Long-distance heat transport based on temperature-dependent magnetization of magnetic fluids

2020 ◽  
Vol 62 (4) ◽  
pp. 711-724
Author(s):  
Yuhiro Iwamoto ◽  
Hayaki Nakasumi ◽  
Yasushi Ido ◽  
Hiroshi Yamaguchi
Keyword(s):  
Heat Transport ◽  
Magnetic Fluids ◽  
Temperature Dependent ◽  
Long Distance ◽  
Temperature Dependent Magnetization

Long Distance Heat Transfer of Pump-Less Heat Transport Device Using Temperature-Sensitive Magnetic Fluids

2018 ◽  
Vol 2018 (0) ◽  
pp. GS3-1
Author(s):  
Yuhiro IWAMOTO ◽  
Hayaki NAKASUMI ◽  
Keita ODAI ◽  
Yasushi IDO ◽  
Hiroshi YAMAGUCHI
Keyword(s):  
Heat Transfer ◽  
Heat Transport ◽  
Magnetic Fluids ◽  
Temperature Sensitive ◽  
Long Distance ◽  
Transport Device

Magnetic Properties of Frozen Magneto-Active Elastomers

2009 ◽  
Vol 152-153 ◽  
pp. 190-193 ◽  
Author(s):  
G.V. Stepanov ◽  
Dmitry Yu. Borin ◽  
Stefan Odenbach ◽  
A.I. Gorbunov
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Carbonyl Iron ◽  
Magnetic Fluids ◽  
Zero Field ◽  
Iron Particles ◽  
Temperature Dependent ◽  
Magnetization Measurements ◽  
Temperature Dependent Magnetization

In the present paper we report temperature dependent magnetization measurements done on a magneto-active elastomers (MAEs) consisting of a siloxane rubber filled with carbonyl iron particles. The experiments performed in this study are similar to the conventional Zero-Field-Cooled and Field-Cooled magnetic tests. To the best of our knowledge, this approach, successfully used for studies on magnetic fluids, has never ever been applied to MAE. This test allowed us to reveal the effect of change of MAE structure under the action of an external magnetic field.

Theoretical Realizability of Dream-Pipe-Like Oscillating/Pulsating Heat Pipe

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Masao Furukawa
Keyword(s):  
Heat Pipe ◽  
Heat Transport ◽  
Capillary Tube ◽  
Feasibility Studies ◽  
Temperature Fields ◽  
Pulsating Heat Pipe ◽  
Long Distance ◽  
Effective Thermal Diffusivity ◽  
Energy Equations ◽  
Adiabatic Section

The state of the art of thermally self-excited oscillatory heat pipe technology is briefly mentioned to emphasize that there exists no oscillating/pulsating heat pipe (OHP/PHP) suited to long-distance heat transport. Responding to such conditions, this study actively proposes a newly devised conceptually novel type of OHP/PHP. In that heat pipe, the adiabatic section works as it were the dream pipe invented by Kurzweg. This striking quality of the proposed new-style OHP/PHP produces high possibilities of long-distance heat transport. To support such optimistic views, an originally planned mathematical model is introduced for feasibility studies. Hydraulic considerations have first been done to understand what conditions are required for sustaining bubble-train flows in a capillary tube of interest. Theoretical analysis has then been made to solve the momentum and energy equations governing the flow velocity and temperature fields in the adiabatic section. The obtained analytical solutions are arranged to give algebraic expressions of the effective thermal diffusivity, the performance index combined with the tidal displacement, and the required electric power. Computed results of those three are displayed in the figures to demonstrate the realizability of that novel OHP.

scholarly journals Temperature-Dependent Wsm1 and Wsm2 Gene-Specific Blockage of Viral Long-Distance Transport Provides Resistance to Wheat streak mosaic virus and Triticum mosaic virus in Wheat

2016 ◽  
Vol 29 (9) ◽  
pp. 724-738 ◽  
Author(s):  
Satyanarayana Tatineni ◽  
Everlyne N. Wosula ◽  
Melissa Bartels ◽  
Gary L. Hein ◽  
Robert A. Graybosch
Keyword(s):  
Mosaic Virus ◽  
Fluorescent Protein ◽  
Wheat Streak Mosaic Virus ◽  
Viral Resistance ◽  
Wheat Cultivars ◽  
Temperature Dependent ◽  
Long Distance ◽  
Long Distance Transport ◽  
Long Distance Movement ◽  
Distance Transport

Wheat streak mosaic virus (WSMV) and Triticum mosaic virus (TriMV) are economically important viral pathogens of wheat. Wheat cvs. Mace, carrying the Wsm1 gene, is resistant to WSMV and TriMV, and Snowmass, with Wsm2, is resistant to WSMV. Viral resistance in both cultivars is temperature sensitive and is effective at 18°C or below but not at higher temperatures. The underlying mechanisms of viral resistance of Wsm1 and Wsm2, nonallelic single dominant genes, are not known. In this study, we found that fluorescent protein–tagged WSMV and TriMV elicited foci that were approximately similar in number and size at 18 and 24°C, on inoculated leaves of resistant and susceptible wheat cultivars. These data suggest that resistant wheat cultivars at 18°C facilitated efficient cell-to-cell movement. Additionally, WSMV and TriMV efficiently replicated in inoculated leaves of resistant wheat cultivars at 18°C but failed to establish systemic infection, suggesting that Wsm1- and Wsm2-mediated resistance debilitated viral long-distance transport. Furthermore, we found that neither virus was able to enter the leaf sheaths of inoculated leaves or crowns of resistant wheat cultivars at 18°C but both were able to do so at 24°C. Thus, wheat cvs. Mace and Snowmass provide resistance at the long-distance movement stage by specifically blocking virus entry into the vasculature. Taken together, these data suggest that both Wsm1 and Wsm2 genes similarly confer virus resistance by temperature-dependent impairment of viral long-distance movement.

Ferromagnetic and Paramagnetic Semiconductors Based upon GaN, AlGaN, and GaP

2001 ◽  
Vol 690 ◽  
Author(s):  
Mark E. Overberg ◽  
Gerald T. Thaler ◽  
Rachel M. Frazier ◽  
Brent P. Gila ◽  
Cammy R. Abernathy ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Beam ◽  
Hysteretic Behavior ◽  
Ferromagnetic Semiconductors ◽  
Temperature Dependent ◽  
Paramagnetic Behavior ◽  
Gas Source ◽  
P Type ◽  
First Time ◽  
Temperature Dependent Magnetization

ABSTRACTEpitaxial growth of the ferromagnetic semiconductors GaMnP:C and GaMnN has been investigated by Gas Source Molecular Beam Epitaxy (GSMBE). GaMnP:C films grown with 9.4% Mn are found to be p-type with hysteretic behavior to room temperature. GaMnN films grown at 700 °C with 2.8% Mn show hysteresis at 300 K, while temperature-dependent magnetization measurements indicate that the magnetism may persist to much higher temperatures (> 325 K). Samples of AlGaMnN have also been prepared for the first time that show improved surface morphology compared to GaMnN but which show only paramagnetic behavior.

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