Article
Thermodynamics
Inseok Yang, Daeho Kim
Summary: This study assessed the measurement uncertainty in thermal conductivity of insulation materials at high temperatures using a guarded hot plate apparatus. By employing calibrated thermocouples and proper auxiliary set temperatures, the effect of stray heat flow on the measurements was reduced.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yves Jannot, Alain Degiovanni, Vincent Schick, Johann Meulemans
Summary: This article introduces a method for measuring the thermal conductivities of anisotropic insulating materials at high temperatures using the parallel hot-wire method. Through a comprehensive model and experimental study, it is found that this method can accurately estimate the thermal conductivities and volumetric heat capacity of the materials.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Yves Jannot, Harouna Mamadou Bal, Christian Moyne
Summary: Biosourced insulating materials present an interesting alternative to petroleum-based products for reducing building energy consumption in response to climate challenges. These materials have the unique feature of being hydrophilic, enabling mass transfer through water evaporation and condensation. A heat/mass transfer 1D model in cylindrical geometry was developed and solved numerically to assess the influence of mass transfer on thermal conductivity estimation using the hot wire and parallel hot wire methods. Experimental results on an anisotropic wood wool confirmed the theoretical findings that the hot wire method measures thermal conductivity while the parallel hot wire method measures an equivalent conductivity that includes the phase change phenomena of water in the medium. Importance rating for this article: 8 out of 10.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yuki Sekimoto, Ryo Abe, Hirotaka Kojima, Hiroaki Benten, Masakazu Nakamura
Summary: Accurate thermal conductivity measurement is crucial for designing microscale thermoelectric and heat transfer devices. The 3 omega method is one of the best methods for measuring conductive wires, as it directly measures thermal conductivity without the need for measuring density or specific heat. However, previous studies did not adequately consider the effects of ambient pressure and conductive adhesive, which could affect the accuracy of measurement. This study investigated the influence of ambient pressure and the length of conductive adhesive on the 3 omega method, providing guidelines for more accurate determination of thermal conductivity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Review
Engineering, Multidisciplinary
S. G. R. Salim
Summary: The accurate determination of thermal conductivity is crucial for understanding the performance and suitability of materials. The hot-wire method is a commonly used technique due to its simplicity and applicability to different materials. This review paper provides an overview of the theory, technical developments, and calculation methods of the hot-wire method.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
H. Zhang, Y. X. Ma, X. Wang, G. H. Tang
Summary: Semi-transparent thermal insulation materials have low extinction coefficients and can transmit infrared spectrum, leading to incorrect thermal conductivity measurements when thermal radiation is not taken into account. Numerical simulations show that the use of transient methods for these materials can overestimate the thermal conductivity, especially at high temperatures.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Krzysztof Powala, Andrzej Obraniak, Dariusz Heim, Andrzej Mrowiec
Summary: This article focuses on the preparation and testing of gypsum mortar consisting of gypsum, phase change material and polymer. The idea was to replace the proven method of adding microencapsulated phase change material by direct binding. The study includes thermal conductivity tests using the hot wire method, temperature change tests during plaster hardening, and compressive strength tests on different samples with varying polymer content.
Article
Thermodynamics
B. Merritt, M. Seneca, S. Larson, K. Davis, T. Munro
Summary: This study develops a modified transient hot-wire needle probe to measure the thermal conductivity of corrosive and high-temperature working fluids. By presenting the physical design and developing the governing equation, thermal conductivity measurements for seven different liquid substances are obtained, and the uncertainty of the measurements is evaluated.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Sanchit Deshmukh, Miguel Munoz Rojo, Eilam Yalon, Sam Vaziri, Cagil Koroglu, Raisul Islam, Ricardo A. Iglesias, Krishna Saraswat, Eric Pop
Summary: Resistive random access memory (RRAM) is a crucial technology for digital storage and analog computing, relying on the formation and rupture of nanoscale conductive filaments. By using scanning thermal microscopy, researchers directly measure the temperature of these filaments and find that they can reach up to 1300 degrees C during steady-state operation, while electrode temperatures rarely exceed 350 degrees C. This highlights the importance of thermal engineering for nanoscale RRAM.
Article
Thermodynamics
Dongchan Kim, Saif Z. S. Al Ghafri, Xiaoxian Yang, Sofia K. Mylona, Thomas J. Hughes, Luke McElroy, Eric F. May
Summary: Thermal conductivity measurements of three ternary hydrocarbon mixtures were conducted using a transient hot-wire apparatus, with results showing that the extended corresponding states (ECS) model can accurately represent the data at high pressure conditions without parameter tuning, while the SUPERTRAPP model has significant deviations when predicting natural gas thermal conductivities.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2021)
Article
Nuclear Science & Technology
Harsh Patel, Maulik Panchal, Abhishek Saraswat, Nirav Patel, Paritosh Chaudhuri
Summary: The thermal properties of lithium metatitanate pebble bed under fusion conditions, including effective thermal conductivity, effective thermal diffusivity, and effective specific heat, were studied. The transient hot-wire technique was used for measurement and the effect of filling gas pressure variation on thermal properties was also investigated. Equations for thermal conductivity and thermal diffusivity as functions of temperature at different pressures in helium gas environment were proposed.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Construction & Building Technology
Saad Raefat, Mohammed Garoum, Najma Laaroussi, Yassine Chihab
Summary: A flash apparatus for thermal diffusivity measurement of building materials was developed and tested in this study, which was then used to estimate the thermal diffusivity of local materials based on clay and straw. A mathematical model was used to process the measured data and estimate the unknown parameters, demonstrating a decrease in thermal diffusivity, thermal conductivity, and heat capacity with an increase in straw mass fraction. The precision and accuracy of the apparatus results were confirmed through measurements on various homogeneous building materials.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Francklin Bobda, Jean Claude Damfeu, Rachel Raissa Ngono Mvondo, Pierre Meukam, Yves Jannot
Summary: The water content of material affects its thermal properties. This study investigates the thermal behavior of two tropical wood species and finds that an increase in water content leads to a linear increase in thermal conductivity and volumetric heat capacity.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Chengjie Wang, Tian Lan, Jimin Xu, Hui Liu, Xiangyang Liu, Maogang He
Summary: Thermal conductivity plays a critical role in screening and designing ionic liquids with good thermoelectric performance. The influence of additional polar solvents and temperature on the thermal conductivity of three ILs is investigated using the newly developed two-wire 3 omega method. The results show that the thermal conductivity of ILs can be reduced by the polar solvents.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Mohameth Dia, Mactar Faye, Mamadou Salif Diallo, Vincent Sambou
Summary: This paper presents an experimental method to estimate the thermal conductivity and thermal diffusivity of materials, taking into account the exchange coefficient around the device. The method measures the temperature at the center of a heating element inserted between two samples, with the unheated surface of the samples being kept constant. The proposed model is validated to provide reliable thermophysical properties of materials.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Nanoscience & Nanotechnology
Greter A. Ortega, S. Del Sol-Fernandez, Yadileiny Portilla, Enrique Cedeno, Edilso Reguera, Seshasai Srinivasan, Domingo F. Barber, Ernesto Marin, Amin Reza Rajabzadeh
Summary: Novel rodlike CdTe@MPA-PDA particles loaded with CdTe quantum dots and polydopamine have unique chemical features and show potential as an actuator for photothermal therapy and oxidative stress induction. These particles interact with cancer cells, induce oxidative stress, and enhance apoptosis, demonstrating their effectiveness as a photothermal agent with subcellular localization capabilities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Education, Scientific Disciplines
A. Bedoya, J. Jaime, F. Rodriguez-Valdes, C. Garcia-Segundo, A. Calderon, R. Ivanov, E. Marin
Summary: This paper discusses the concept of thermal impedance derived from electrical resistance and impedance concepts, showing how it can be used to compare the efficiency of different heat transfer modes. It also touches upon the little-known case of non-Fourier heat conduction.
EUROPEAN JOURNAL OF PHYSICS
(2021)
Article
Engineering, Environmental
Luz A. Hernandez-Carabali, Rakesh Sachdeva, Jose B. Rojas-Trigos, Ernesto Marin, Carlos D. Garcia
Summary: In this study, a thin film of ZnO was grown and characterized to investigate its effect on the photo-chemical degradation of pharmaceuticals. The results showed that the film was able to efficiently degrade pharmaceutical compounds under relatively mild conditions and was applicable to other compounds with similar properties.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Arlem Lara-Bernal, Marcelo G. Da Silva, Leonardo Mota, Ernesto Marin, Thallis C. Cordeiro, Edson C. Da Silva, Daniel A. Viana, Helion Vargas, Jose Carlos Polidoro, Marisa Bezerra De Mello-Monte
Summary: This report describes the investigation of Brazilian and Cuban zeolites using photoacoustic and electron paramagnetic resonance techniques. The presence of iron and manganese ions in both zeolites was confirmed, and their electronic transitions were assigned. Crystal field parameters and Racah parameters were assessed. Paramagnetic resonance results confirmed the presence of Fe3+ ions in Brazilian zeolite and revealed the overlapping hyperfine structure of Mn2+ ions in the Cuban sample. The findings suggest that Mn2+ ions are in octahedral symmetry, likely replacing calcium ions and exhibiting an ionic bonding character.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2022)
Article
Dermatology
Claudia Cervantes-Duran, Miguel Avalos-Viveros, Luz Torner, Sandra-Guadalupe Sanchez-Ceja, Alain-Raimundo Rodriguez-Orozco, Hector-Eduardo Martinez-Flores, Martha-Estrella Garcia-Perez
Summary: The study found that in the IMQ-induced psoriasis mice model, the development of secondary chronic allodynia and hyperalgesia could be modulated by anti-inflammatory agents and compound 48/80, and the activation of 5-HT1A receptor might regulate these nociceptive behaviours. Additionally, it was observed that the long-lasting pain resulting from psoriasis inflammation is associated with the serotonergic system, indicating that the 5-HT1A receptor could be a potential therapeutic target for psoriasis pain modulation.
EXPERIMENTAL DERMATOLOGY
(2022)
Article
Thermodynamics
E. Contreras-Gallegos, F. A. Dominguez-Pacheco, C. Hernandez-Aguilar, A. Bedoya, S. Alvarado, E. Marin, A. Cruz-Orea
Summary: We characterized the bio-additive from Jatropha curcas L. oil (JBA) in mineral-based oil (MBO) at different viscosities by measuring kinematic viscosity and mass density. Thermal conductivity and specific heat were obtained using thermal effusivity and thermal diffusivity, respectively. We observed a correlation between kinematic viscosity and thermal conductivity with the percentage of JBA in the blend. The results demonstrate that JBA has the potential to improve the thermal properties of MBOs and can be used as a viscosity modifier.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2022)
Article
Materials Science, Multidisciplinary
I Riech, M. Zambrano, A. Abelenda, F. Maldonado, A. Rojas-Marroquin, J. Jaime, A. Calderon, E. Marin
Summary: The paper demonstrates the utility of photoacoustic spectroscopy (PAS) in monitoring intermixing at thin film heterojunctions. By analyzing CdTe/CdS bilayers of different thicknesses, researchers observed changes in the position of an optical absorption band correlating with the CdTe layer thickness in the structure. These findings were supported by PAS-Phase-Resolved and X-Ray photoelectron spectroscopy techniques.
Article
Materials Science, Multidisciplinary
Rafael Contreras-Chavez, Ma Guadalupe Garnica-Romo, Hector Eduardo Martinez-Flores, Juan de Dios Figueroa-Cardenas, Carlos Alberto Rodrigues Anjos, Alfonso Topete-Betancourt
Summary: This study identified the optimal additive conditions for developing a film from alternative source of modified starch using response surface methodology. It successfully obtained an ecological film with low water vapor permeability, high elongation percentage, and reduced solubility, making it suitable for food packaging. This research also opens up possibilities for incorporating other compounds and shows a positive outlook on the use of alternative starch sources.
MATERIALS RESEARCH EXPRESS
(2021)
Editorial Material
Chemistry, Physical
E. Marin, A. Calderon
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Ma Guadalupe Garnica-Romo, Mariana Romero-Arcos, Hector Eduardo Martinez-Flores
Summary: In this study, a bioreceptor consisting of a titania-based nanostructure was developed using the sol-gel method. The bioreceptor, called TiO2/NAF/LAC, was able to immobilize laccase and detect gallic acid. Experimental results showed that the bioreceptor had a low detection limit and a wide linear range.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Thermodynamics
Adrian Bedoya, Ernesto Marin, Joan Jaime Puldon, Crescencio Garcia-Segundo
Summary: The laser-spot active lock-in infrared thermography technique is an advantageous method for measuring the thermal diffusivity and conductivity of thermal insulators simultaneously by utilizing heat losses through conduction. This method allows for shorter measurement time, thicker samples, and lower excitation powers compared to traditional techniques. It also reveals interesting behavior related to thermal wave wavelength. Furthermore, this technique has potential for characterizing anisotropic samples.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2023)
Article
Instruments & Instrumentation
A. D. Vargas-Vargas, J. L. Mejorada-Sanchez, F. R. Castellanos-Duran, E. Vargas, M. A. Isidro-Ojeda, E. Cedeno, J. B. Rojas-Trigos, A. Calderon, E. Marin
Summary: Based on experimental results, it is demonstrated that the widely used model for dual beam transient thermal lens spectroscopy technique is applicable when a high repetition frequency pulsed pump laser is used instead of a continuous wave source. The optical absorbance of water samples colored with a tartrazine dye was compared using continuous and pulsed laser sources emitting at the same excitation wavelength, and a photothermal quantum yield of approximately 90% was obtained. Near-infrared fluorescence quantum yield spectrum of a CF (R) 800 dye dissolved in water was measured using a tunable MAI TAI BB laser oscillator, revealing significant fluorescence quenching due to water optical absorption through a comparison with optical absorbance spectra measured by the thermal lens technique and a conventional transmittance experiment.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Physics, Applied
Agustin Salazar, Arantza Mendioroz, Felix Rodriguez-Valdes, Adrian Bedoya, Ernesto Marin, Crescencio Garcia-Segundo
Summary: In laser-spot lock-in thermography, the surface temperature decreases monotonically with the distance to the laser spot, which is commonly used to measure the in-plane thermal diffusivity. However, thermal insulators show an unexpected and abrupt slope change in the radial profiles. This work demonstrates that heat conduction to the air surrounding the sample causes this behavior and takes advantage of the slope change to retrieve in-plane thermal diffusivity and conductivity of thermal insulators.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Agriculture, Dairy & Animal Science
Gerardo Ordaz, Aureliano Juarez, Manuel Lopez, Hector Eduardo Martinez, Rosa Elena Perez, Ruy Ortiz
Summary: This study found that Opuntia ficus-indica extract favorably regulates biochemical indicators related to insulin resistance development, leading to higher VFI and less body weight loss in lactating sows.
JOURNAL OF APPLIED ANIMAL RESEARCH
(2021)
Review
Water Resources
Syed Muzzamil Hussain Shah, Zahiraniza Mustaffa, Eduardo Martinez-Gomariz, Khamaruzaman Wan Yusof, Ebrahim Hamid Hussein Al-Qadami
Summary: The paper addresses the importance of guidelines for street drainage systems design and analysis in ensuring safety during flooding events. It discusses the guidelines recommended in the Australian Rainfall and Runoff report, as well as the limitations of previous studies on the stability of old-fashioned and modern vehicles. Additionally, it explores methods to address the hydrodynamic response of non-static modern vehicles endangered by floodwaters.
INTERNATIONAL JOURNAL OF RIVER BASIN MANAGEMENT
(2021)