Drag reduction by natural polymeric additives in PMDS microchannel: Effect of types of additives

Ling, Fiona W. M.; Abdulbari, Hayder A.

doi:10.1051/matecconf/201711101001

Cited by 10 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8. 8 d and 8 e. The results were contradictory to literature [35] where one of the tested additives would maintain its high flow enhancement performance regardless of the other operating conditions. It can be clearly seen that different types of additives showed its maximum %FI under different conditions like concentrations and operating pressure.…”

Section: Effect Of Type Of Additivescontrasting

confidence: 66%

“…Higher concentrations of okra (700 and 1000 ppm) performed as better DRAs compared to the other two mucilages under the same condition as demonstrated in Figs. 8 d and 8 e. The results were contradictory to literature [35] where one of the tested additives would maintain its high flow enhancement performance regardless of the other operating conditions. This phenomenon indicated that the flow enhancement operation is the complex interaction from different aspects including the properties of additives (density, molecular weight, and structure), concentration of the solution added, flow conditions, and even the design of the test section, in this case the design of the microchannel.…”

Section: Effect Of Type Of Additivescontrasting

confidence: 66%

“…Introduction of aloe vera into the animal models with myocardial ischemia condition is proven to reduce the animal mortality [33]. Besides aloe vera, other organic polymers extracted from natural plants such as okra and hibiscus also enhanced the laminar flow in microchannels which have the same dimension of human heart blood vessels [34,35].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Organic Additives for the Enhancement of Laminar Flow in a Brain‐Vessels‐Like Microchannel Assembly

2019

Self Cite

View full text Add to dashboard Cite

Organic polymers were extracted from okra, aloe vera, and hibiscus leaves and used as drag-reducing additives (DRAs) to enhance the laminar flow in custommade microchannels that simulate the human brain vessels. The experiment was conducted using an open-loop microfluidic system. The flow enhancement performance was evaluated as the function of percentage of flow increment of mucilage additives at different concentrations. Okra mucilage showed greater flow enhancement performance at higher mucilage concentration while both aloe vera and hibiscus mucilage performed better at lower additive concentration. The findings prove the potential of these organic polymers as DRAs to enhance the blood flow.

show abstract

Section: Effect Of Type Of Additivescontrasting

confidence: 66%

Section: Effect Of Type Of Additivescontrasting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Organic Additives for the Enhancement of Laminar Flow in a Brain‐Vessels‐Like Microchannel Assembly

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…A few attempts were made by Abdulbari et al [27,28] to utilize these additives as effective drag reducing agents in pipelines. Several types of additives from different plants were successfully investigated as DRA such as aloe vera [29], hibiscus leaves [30,31], and okra [27,28]. Despite the excellent drag reduction performance of the proposed organic polymers, all these additives showed low stability against shear forces exerted by pumps, valves and joints.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer–Surfactant Complexes as Flow Enhancers: Characterization and Performance Evaluation

et al. 2019

Self Cite

View full text Add to dashboard Cite

Artificial polymeric additives are known, and experimentally proven, to be effective drag reducing agents in pipelines with turbulent flow medium. The artificial nature of these additives and their low resistance to high shear forces, exerted by the pipeline geometries and equipment, are considered as major problems against a wider implementation in other industrial applications. The present work introduces a new polymer-surfactant complex of two organic additives (chitosan and sodium laurel ether sulfate, SLES) as a drag reducing agent. The rheological and morphological properties of the new complexes were experimentally tested. The new complex’s drag reduction performance and stability against high shear forces were analyzed using rotating disk apparatus. All the investigated solutions and complexes showed a non-Newtonian behavior. The cryo-TEM images showed a unique polymer-surfactant macrocomplex structure with a nonlinear relationship between its rheological properties and surfactant concentration. A maximum flow enhancement of 47.75% was obtained by the complex (chitosan 300 and 400ppmof chitosan and SLES, respectively) at the rotation speed of 3000 rpm. Finally, the stability of the proposed additives was highly modified when the additive complexes were formed.

show abstract

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

2022

Self Cite

View full text Add to dashboard Cite

Heterogeneous reactions are considered the heart of chemical synthesis with numerous industrial applications due to their high conversion rates and low reaction time. On the other hand, the performance of heterogeneous reactions suffers from several drawbacks such as lower product selectivity and high mass transfer resistance that, in many cases, reduce the reaction rate. The efficiency of various conventional mixing techniques in heterogeneous reactors is believed to play a critical role in controlling the product quality and mass transfer rates besides other essential factors. Microfluidics technology provides a unique opportunity to revisit many established heterogeneous reaction processes to optimize and understand the reaction mechanisms. The unique flow conditions in microflow systems provide an excellent platform for exploring the effect of high‐precision micromixing techniques on reaction rates and productivities. Recent advances in microreactor technology in general and specifically heterogeneous reactions in microflow systems with an insight on the enzymatic reactions in microreactors are reviewed.

show abstract

Drag reduction by natural polymeric additives in PMDS microchannel: Effect of types of additives

Cited by 10 publications

References 17 publications

Organic Additives for the Enhancement of Laminar Flow in a Brain‐Vessels‐Like Microchannel Assembly

Organic Additives for the Enhancement of Laminar Flow in a Brain‐Vessels‐Like Microchannel Assembly

Biopolymer–Surfactant Complexes as Flow Enhancers: Characterization and Performance Evaluation

Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions

Contact Info

Product

Resources

About