Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

1: Magnetic Particles: Preparation, Properties and Applications: M. Ozaki. 2: Maghemite (gamma-Fe2O3): A Versatile Magnetic Colloidal Material C.J. Serna, M.P. Morales. 3: Dynamics of Adsorption and Oxidation of Organic Molecules on Illuminated Titanium Dioxide Particles Immersed in Water M.A. Blesa, R.J. Candal, S.A. Bilmes. 4: Colloidal Aggregation in Two-Dimensions A. Moncho-Jorda, F. Martinez-Lopez, M.A. Cabrerizo-Vilchez, R. Hidalgo Alvarez, M. Quesada-PMerez. 5: Kinetics of Particle and Protein Adsorption Z. Adamczyk.

Surface and Colloid Science

Fast Fourier Transform

Educators, researchers, and policy makers have advocated student involvement for some time as an essential aspect of meaningful learning. In the past twenty years engineering educators have implemented several means of better engaging their undergraduate students, including active and cooperative learning, learning communities, service learning, cooperative education, inquiry and problem-based learning, and team projects. This paper focuses on classroom-based pedagogies of engagement, particularly cooperative and problem-based learning. It includes a brief history, theoretical roots, research support, summary of practices, and suggestions for redesigning engineering classes and programs to include more student engagement. The paper also lays out the research ahead for advancing pedagogies aimed at more fully enhancing students’ involvement in their learning.

/pdf/pedagogies-of-engagement-classroom-based-practices-5cfm8gf709.pdf

Pedagogies of Engagement: Classroom-Based Practices

Temperature (T) is probably the most fundamental parameter in all kinds of science. Respective sensors are widely used in daily life. Besides conventional thermometers, optical sensors are considered to be attractive alternatives for sensing and on-line monitoring of T. This Review article focuses on all kinds of luminescent probes and sensors for measurement of T, and summarizes the recent progress in their design and application formats. The introduction covers the importance of optical probes for T, the origin of their T-dependent spectra, and the various detection modes. This is followed by a survey on (a) molecular probes, (b) nanomaterials, and (c) bulk materials for sensing T. This section will be completed by a discussion of (d) polymeric matrices for immobilizing T-sensitive probes and (e) an overview of the various application formats of T-sensors. The review ends with a discussion on the prospects, challenges, and new directions in the design of optical T-sensitive probes and sensors.

Luminescent probes and sensors for temperature.

An Experimental Study of Flow and Heat Transfer in Offset Strip and Louvered-Fin Heat Exchangers

Experimental Investigation of Wetting Anisotropy on Microgrooved Brass Surfaces

The retention of water on the air-side surface of heat exchangers is important in air conditioning, refrigeration, and heat pumping applications. Recently, surfaces with grooves tens to hundreds of micrometers deep and wide have been proven highly effective in promoting water drainage from heat exchangers. Dynamic wetting behavior governs the motion of drops on such surfaces, and this work provides the first data on the dynamic wetting behavior on microgrooved metallic surfaces. Moving drops on microgrooved surfaces can be in a Wenzel or Cassie–Baxter wetting state. In a Wenzel wetting state, drops are elongated and have a tail; the length of the tail increases with Wenzel roughness. In a Cassie–Baxter wetting state, drops become more elongated as the Cassie–Baxter roughness increases. Drops in the Wenzel and Cassie–Baxter wetting states have dynamic advancing contact angles that increase with drop velocity and dynamic receding contact angles that decrease with velocity. In the Cassie–Baxter state, dynami...

Dynamic Wetting Behavior and Water Drops on Microgrooved Surfaces

Air-side thermal-hydraulic performance of louvered-fin, flat-tube heat exchangers with sequential frost-growth cycles

The so-called ‘modified Wilson-Plot’ technique is commonly accepted as the preferred method for interpreting airside heat transfer performance data for liquid- and refrigerant-to-air heat exchangers. Indeed, there are good reasons to believe Wilson-Plot techniques are superior to alternative data interpretation schemes. Unfortunately, Wilson-Plot methods are conceptually and computationally more complex than the other methods and it is not possible to simply extend the single-sample uncertainty analysis of Kline and McClintock to the modified Wilson-Plot technique. A rational approach to uncertainty analysis for the modified Wilson-Plot is not available in the literature, but if this method—accepted as superior to others—is to be widely adopted, a well-defined approach to uncertainty analysis is needed. The purpose of this paper is to provide an uncertainty analysis appropriate for the modified Wilson-Plot technique.

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1626&context=iracc

Anthony M. Jacobi

Papers

An Experimental Study of Flow and Heat Transfer in Offset Strip and Louvered-Fin Heat Exchangers

Experimental Investigation of Wetting Anisotropy on Microgrooved Brass Surfaces

Dynamic Wetting Behavior and Water Drops on Microgrooved Surfaces

Air-side thermal-hydraulic performance of louvered-fin, flat-tube heat exchangers with sequential frost-growth cycles

Modified wilson-plot technique for heat exchanger performance: strategies for minimizing uncertainty in data reduction