ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Dissolving small amounts of additives in water, such as polymers or surfactants (surface active agents), can reduce frictional drag in pipe or channel flow by 70%-80%. Surfactant solutions are less affected by mechanical degradation (Gyr and Bewersdorff., 1995). Literature research (Li and al., 2005) resulted that even low concentrations of (25ppm) CTAC exhibit effective drag-reduction. Therefore, surfactants are now being considered as particle drag reduction additives. The aim of this work is to study the effect of an aqueous surfactant solution (CTAC/NaSal at 75ppm) on drag reduction and on the flow pattern in the temperature range of 10 to 40°C. The measurement set-up used in the pressure drop measurement was developed in our laboratory. A PIV system is used in order to analysis the internal flow properties.