Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger

Cabral, Renato Alexandre Ferreira; Gut, Jorge Andrey Wilhelms; Telis, Vânia Regina Nicoletti; Telis‐Romero, Javier

doi:10.1590/s0104-66322010000400008

Cited by 9 publications

(4 citation statements)

References 21 publications

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“…However, the 9° Bx and 11° Bx juice sample's friction differed significantly, indicating the significant effect of concentration on transport pumps' friction losses and power sizing. The obtained results agree with those for soursop, pineapple, and sugarcane juices reported by Gratao et al (2007), Cabral et al (2010), and Astolfi-Filho et al ( 2011), respectively.…”

Section: Reynolds Number Influence On Fanning Friction Factorsupporting

confidence: 92%

Effect of Using the Variable Frequency Drive and Different Pipe Materials on the Pipe Flow of Guava Juice

shalaby

mustafa

Heikal

et al. 2022

Arab Universities Journal of Agricultural Sciences

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In this study, a designed variable frequency drive (VFD) was used to control a single-phase induction motor's speed to pump guava juice at two solid concentrations (9°Bx and 11°Bx). Next, the pressure drop was measured in stainless-steel pipes of three diameters. The pressure drop percentage difference before and after using the VFD at varied flow rates with 10 repetitions at 5 min intervals was evaluated. The pressure drop reduction range was 19.7%-30.8% and 19.2 %-32.4% for the 9% and 11% solid concentrations respectively after using the VFD, which resulted in an average of 25.73% reductions in pressure drop and pump's total head and driving power. The rheological properties of guava juice were investigated at various temperatures (5, 15, 25, 35, 55 and 75°C). From the results, all materials exhibited non-Newtonian pseudoplastic behavior at all temperatures and concentrations, and correlated well with the power law model, with flow behavior index (n) values less than unity for the 9% and 11% solid concentrations. The findings offer helpful information for predicting how heat variations during processing influence the behavior of guava juice concentrates.

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Section: Reynolds Number Influence On Fanning Friction Factorsupporting

confidence: 92%

Effect of Using the Variable Frequency Drive and Different Pipe Materials on the Pipe Flow of Guava Juice

shalaby

mustafa

Heikal

et al. 2022

Arab Universities Journal of Agricultural Sciences

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“…The temperature also plays an important role in the experimental data results, since at each level of solid concentration, the shear stress decreased as temperature increased in the range of shear rate studied. This behavior was reported in products such as broth cultures of Saccharomyces cerevisiae , fruit juices and purées , concentrated pineapple juice , clarified banana juices and concentrated sugarcane molasses . On the other hand, Mechetti et al ., and Rouillard and Koenig suggest that the concentration also influences the rheology of molasses, since at high solid concentrations, the broth is more viscous and the rheological behavior is more different than at lower concentrations.…”

Section: Resultsmentioning

confidence: 52%

Rheological behavior of molasses for application in industry

Bofo

Cabral

Andrietta

et al. 2016

Env Prog and Sustain Energy

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Molasses is a by-product from the raw sugarcane industry with vast applications in the production of ethanol biofuel. A good knowledge of the rheological properties of this raw material is of crucial importance when designing and optimizing unit operations involved in processing it. The present work thus aims to study the rheological behavior of molasses at solid concentrations ranging from 20 to 70 o Brix and temperatures between 21 and 988C using a concentriccylinder rheometer. Experimental results showed Newtonian behavior in concentrations of 20 and 40 o Brix and pseudoplastic behavior in concentrations of 50 and 70 o Brix. For these results, the Power Law models presented the best fitting results. In addition, the dependence of the flow behavior index and the flow consistency index of the Power Law model on temperature and solid concentration was also successfully modeled through a polynomial model and an Arrhenius-type equation, respectively.

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“…where ρ is the mud density. Laminar flow occurs in a non-Newtonian fluid for generalized Reynolds numbers below 2100 [22,28,46,47]. Typically, drill pipe flow is turbulent whereas annular flow is laminar to transitional.…”

Section: Pipe Viscometer Measurementsmentioning

confidence: 99%

Rheological behavior of a bentonite mud

2020

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Predicting drilling fluids rheology is crucial to control/optimize the drilling process and the gas extraction from drilling fluids in logging systems. A Couette viscometer measured the apparent viscosity of a bentonite mud at various shear rates and temperatures. The bentonite mud behaved as a yield-pseudoplastic fluid, and a modified Herschel-Bulkley model predicted the shear rate and temperature effects upon the shear stress. A pipe viscometer was built to seek a correlation between the mud flow rate and the pressure drop and thereby determine refined Herschel-Bulkley parameters. Coupling a rheological model to a pipe viscometer enables the continuous acquisition of apparent viscosities of Newtonian or non-Newtonian fluids at a rig-site surface.

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Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger

Cited by 9 publications

References 21 publications

Effect of Using the Variable Frequency Drive and Different Pipe Materials on the Pipe Flow of Guava Juice

Effect of Using the Variable Frequency Drive and Different Pipe Materials on the Pipe Flow of Guava Juice

Rheological behavior of molasses for application in industry

Rheological behavior of a bentonite mud

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