... and transmission electron microscopies. In order to investigate the influence of synthesis conditions on the thermal conductivity of composites, various concentrations of multiwall carbon nanotubes, graphites, surfactants, and polymer matrix materials as well as two different nanoparticles and solvents were tested...

... the use of surfactant. Quench probes with a diameter of 20 mm and a length of 50 mm were prepared from 304L stainless steel. Thermocouples were fixed at the selected location inside the quench probes and the probes were quenched in distilled water and CNT nanofluids. During quenching, time-temperature...

...Anna S. Cherkasova; Jerry W. Shan The effective thermal conductivities of aqueous nanofluids containing surfactant-stabilized multiwalled carbon nanotubes were measured and compared with the predictions of effective medium theory ( Nan, C.-W., et al., 1997, “Effective Thermal Conductivity...

... are acquired. The above data are obtained using commercial seamless stainless steel tube heater with an outer diameter of 9.0 mm and an average surface roughness of 1.09 μ m . The experimental results concluded that (i) critical heat flux (CHF) obtained in water with surfactant nanofluids gives nearly one...

...Minh Do-Quang; Gustav Amberg; Claes-Ove Pettersson This paper presents a comprehensive three-dimensional, time-dependent model for simulating the adsorption kinetics and the redistribution of surfactants at the surface and in the bulk of a weld pool. A physicochemical approach that was included...

...Wael I. A. Aly; Hideo Inaba; Naoto Haruki; Akihiko Horibe Flow drag and heat transfer reduction phenomena of non-ionic aqueous surfactant solutions flowing in helical and straight pipes have been experimentally investigated at surfactant solution concentration range of 250 - 5000 ppm...

...Paul L. Sears; Libing Yang Heat transfer coefficients were measured for a solution of surfactant drag-reducing additive in the entrance region of a uniformly heated horizontal cylindrical pipe with Reynolds numbers from 25,000 to 140,000 and temperatures from 30 to 70 ° C . In the absence...

...Juntao Zhang; Raj M. Manglik Interfacial phenomena and ebullient dynamics in saturated nucleate pool boiling of aqueous solutions of three surfactants that have different molecular weight and ionic nature are experimentally investigated. The additive molecular mobility at interfaces manifests...

... concentrations of a natural fluorescence dye (Pyrene), and with a surfactant substance, cetyldimetylbenzylammoniumchloride (CDBAC) to improve the fluorescence emission and the rate of its two band emission (excimer to monomer) is used to determine the temperature. The temperature distribution along the stream...

...Juntao Zhang; Raj M. Manglik, Mem. ASME Saturated, nucleate pool boiling on a horizontal, cylindrical heater and the associated bubble dynamics in aqueous solutions of cationic surfactants of different molecular weight and ethoxylation or ethylene oxide (EO) content, are experimentally investigated...

...Vivek M. Wasekar; Raj M. Manglik, Mem. ASME The effects of surfactant concentration on the initial short-time-scale Marangoni convection around boiling nuclei in aqueous solutions have been computationally investigated. The model consists of a hemispherical bubble (1–100 μm radius) on a downward...

...G. Hetsroni, Fellow ASME; A. Mosyak; Y. Talmon; A. Bernheim-Groswasser; J. L. Zakin The thermal pattern on a heated wall was studied for the flow of water and drag-reducing surfactant solutions in a channel. The wall of the channel was made of a thin foil, which was heated by direct current...

...Juntao Zhang; Raj M. Mangilk surfactants solutions boiling flow visualisation charge-coupled devices Journal of Heat Transfer AUGUST 2003, Vol. 125 Õ 547 2003 ASME ...

... in a two-dimensional channel by utilizing the characteristic of fluid was studied. As the networks of rod-like micelles in surfactant solution are responsible for suppressing the turbulence in drag-reducing flow, destruction of the structure of networks was considered to eliminate the drag reduction...

...V. M. Wasekar; R. M. Manglik, Mem. ASME Saturated nucleate pool boiling of aqueous surfactant solutions on a horizontal cylindrical heater has been experimentally investigated. Sodium dodecyl or lauryl sulfate (SDS or SLS), an anionic surfactant, is employed. Boiling performance, relative...