Nucleation is the formation of a new phase that has ability to irreversibly and spontaneously grow into large-sized nucleus within body metastable parent phase. In this experimental work, effect wettability on incipiation vacuum-driven bubble nucleation, boiling, consequent rate evaporative cooling are studied. One hydrophilic (untreated), three hydrophobic (chlorinated polydimethylsiloxane, ch...

Objective: The main objective pursued in this paper is to investigate the energy consumption for drying of potato slices using vacuum-infrared drying method. Methods: Drying of potato slices with the thicknesses of 1, 2 and 3 mm were conducted at vacuum levels of zero (without vacuum), 20, 80 and 140 mm [Hg], infrared radiation at power levels of 100, 150 and 200 W in the three repetition. Resu...

Objective: The main objective pursued in this paper is to investigate the energy consumption for drying of potato slices using vacuum-infrared drying method. Methods: Drying of potato slices with the thicknesses of 1, 2 and 3 mm were conducted at vacuum levels of zero (without vacuum), 20, 80 and 140 mm [Hg], infrared radiation at power levels of 100, 150 and 200 W in the three repetition. Resu...

Introduction: Dental turbine chamber is a suitable reservoir for living microorganisms, so chamber sterilization is necessary for reducing cross contamination risk. On the other hand, in non-vacuum autoclaves, steam penetration into turbine chamber is doubtful, while they are still in use in dental clinics. In this study, performance of small non-vacuum autoclave in turbine chamber sterilizatio...

the neat bitumen, an oil refining by-product, has its own inherent weakness under long-time loading at low and high temperatures. these performance limitations of neat bitumen have led researchers to modify its physical andmechanical properties. according to several studies, polymers can be used to modify the properties of bitumen. due to much lower production costs and aiming to reduce environ...

this article is a comparative evaluation of airflow in two kinds of yazdi and kermani wind-towers. in the late decades of twenty century regarding to high population growth rate and energy crisis, vernacular architecture and its passive methods for gaining thermal comfort, has been strongly focused. moreover, a huge scientific movement setup for researches deep in exploring passive cooling and ...

The scanning electron microscope (SEM) is a versatile instrument for the investigation of a wide variety of materials. The advent of the low vacuum technology for SEM has simplified specimen preparation and widened the range of materials that can be investigated with this technique. Charging artifacts can be controlled or eliminated and non-vacuum compatible samples (out-gassing, hydrated speci...

Maintaining phosphoric slurry within the optimal temperature range is of great significance in improving the quality of the phosphoric acid product. Due to the lack of integral parts and the limited number of expert rules, general fuzzy controllers are commonly incapable of achieving accurate output. This paper proposed a novel fuzzy controller based on variable universes of discourse (VUD) to ...

Abstract The konjac polysaccharide aerogel filter rod has the functions of high filtration efficiency and cooling. biodegradation rate prepared by vacuum freeze drying machine was studied in this paper. results showed that at end degradation experiment (the 106 th day), gel reached 84.9%, which close to thin-layer chromatography grade cellulose, indicating it had good biodegradability.