Experimental investigation on momentum and drag reduction of Malaysian crop suspensions in closed conduit flow

Abstract

Abstract. The study of frictional losses in fiber suspension flow is one of the significant scientific interests as the characteristics of suspension flow considerably changes with shear stress, fiber source, and treatments applied on fibers. Pressure drop measurements were obtained for different Malaysian crop fiber suspensions flowing through a closed conduit. The generated data were gathered over a range of flow rates and suspension concentrations. It was found that the magnitude of the pressure drop of the fiber suspensions is dependent on the concentration, characteristics, and fiber source. Considerable drag reduction is obtained for concentration of 0.6 wt. % at high flow rates. Such a reduction of pressure drop at the particular concentrations and the flow rates is interesting and useful as these data can be used for design and optimization of fiber handling equipment and piping systems. Furthermore, the effect of different fibers, fiber properties and flexibility on pressure drop were studied.

Toward improved heat dissipation of the turbulent regime over backward-facing step for the AL2O3-water nanofluids: An experimental approach

“…Further, in fig.7 the addition of nanoparticles increases the viscosity of base fluid slightly due to which a little difference between the different curves at varying concentrations are observed. Contrary to the pressure drop of fiber suspensions studies, where with the increase of concentration and flow rate the pressure drop decreases [37].…”

An Overview on Most Effective DRAs in Crude Oil Pipelines

“…Amir et al [39] used polyacrylonitrile fibers of larger lengths (6 mm) demonstrated minor and a rectangular pipe with 6m length are used, drag-reducing effects (up to 3%). Ahmed et al [40] used Kenaf core pulp fiber DR increases to about 5.09% at concentration 0.6%.wt. Gharehkhani, Samira et al [41] added a small amount of fiber to water , the maximum drag reduction of 24% occurred at 0.6 wt.% concentration and pipe diameter of 40 mm.…”

Preparation and Application of Natural and Low Cost Palm Fibers as an Effective Drag Reducing Agent for Flow Improvement in Iraqi Crude Oil Pipelines

“…Amir E, et al 2017 [16] used olyacrylonitrile fibers of largerlengths (6 mm) demonstrated minor and a rectangular pipe with 6m length are used, drag-reducing effects (up to 3%). Ahmed, S. M., et al 2017 [17] used Kenaf core pulp fiber DR increase to about 5.09% at concentration 0.6%.wt. Gharehkhani, Samira, et al 2017 [18] added a small amount of fiber to water , the maximum drag reduction of 24% occurred at0.6 wt.% concentration andpipe diameter of 40 mm.…”