Results 11 to 20 of about 69,648 (262)
Assessment of Friction Losses and Friction Factor in Polypropylene Pipes
Tikrit Journal of Engineering SciencesRecently, polypropylene (PPR) pipes have been increasingly used to replace galvanized iron pipes in most water transmission systems due to their ease of installation and perceived health safety. Also, PPR has engineering features that do not deteriorate
Ahmed Abdulatif Jadoua +1 more
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On Input Market Frictions and Estimation of Factors' Demand [PDF]
Southern Economic Journal, 2011 In this article, we explore the impact of imperfectly competitive input markets on production function estimation. First‐order profit‐maximizing conditions are altered when frictions in input markets cause the elasticity of input supply to the firm to be finite.
Arnaud Dupuy, Todd Sorense
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Energies, 2021 This paper presents an experimental study on a shell and tube mini heat exchanger (STMHE). The STMHE consisted of seven tubes in a triangular arrangement, with an 0.8 mm inner diameter and 1.0 mm outer diameter.
Mateusz Prończuk, Anna Krzanowska
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International Journal of Thermofluids, 2021 A variety of nanofluids flowing through multiple parallel pipes were numerically studied to examine the heat enhancement effects. Due to the advantages they bring in the cooling process, nanofluids have provided a new way to improve the performance of ...
A.T. Manzoor, M.Z. Saghir
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Zhileng xuebao, 2007 The effects of space of fins, number of tube rows and relative humidity of incoming air on airside performance of waw fin with hydrophilic coating under dehumidifying conditions were experimentally explored for seven waw fin - and - tube heat exchangers ...
Zhang Yuanming +2 more
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Effect of organic acid concentration in lubricant on tribological characteristics of friction couple
Advanced Engineering Research, 2019 Introduction. The possibility of using monocarboxylic acids as a lubricant composition additive, and the effect of their concentration in lubricant on the evolution of the friction factor of a brass-steel couple, as well as the morphology of the film ...
V. E. Burlakova, E. G. Drogan
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Measurement of Local Convective Heat Transfer Coefficient of Alumina-Water Nanofluids in a Double Tube Heat Exchanger [PDF]
Journal of Chemical and Petroleum Engineering, 2019 Heat transfer coefficient and thermal efficiency of γ-Al2O3/water nanofluids flowing through a double tube heat exchanger were experimentally investigated. The nanoparticles were well dispersed in distilled water at 0.05–0.15 %vol.
Behrouz Raei +1 more
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Structure‐forward targeting of claudins with synthetic binders
FEBS Letters, EarlyView.Claudins form the paracellular barriers between epithelial and endothelial tissues at tight junctions and are targets for molecular binders with the goal of modulating barrier permeability. Claudin‐binding molecules are relevant in drug delivery or in altering claudin interactions with disease‐causing proteins.
Alex J. Vecchio
wiley +1 more source
Petroleum ResearchThe friction factor plays a critical role in drag and torque calculations. In the drag and torque model, the friction factor is typically treated as an average value, or the wellbore is roughly divided into casedhole and openhole segments with different ...
Hu Yin +4 more
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Energies, 2023 In this study, the heat transfer augmentation and friction factor of a novel type of solar air heater (SAH), which incorporates longitudinal fins and rectangular turbulators, were investigated numerically with different arrangements of the turbulators ...
Byeong-Hwa An +2 more
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