Friction Losses in Valves and Fittings for Viscoplastic Fluids

Telis‐Romero, Javier; Polizelli, Marcos Alexandre; Gabas, Ana Lúcia; Telis, Vânia Regina Nicoletti

doi:10.1002/cjce.5450830205

Cited by 13 publications

(7 citation statements)

References 12 publications

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“…Shear rate range was 0.5 to 300 s -1 and both upward and downward tests were performed in duplicate for each temperature and soluble solids content combination. The experimental procedure was previously tested by a rheological study of ethylene glycol and chlorobenzene (Telis-Romero et al, 2005;Polizelli et al, 2003).…”

Section: Density and Rheological Behaviormentioning

confidence: 99%

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

Cabral

Gut

Telis

et al. 2010

Braz. J. Chem. Eng.

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-The study of non-Newtonian flow in plate heat exchangers (PHEs) is of great importance for the food industry. The objective of this work was to study the pressure drop of pineapple juice in a PHE with 50º chevron plates. Density and flow properties of pineapple juice were determined and correlated with temperature (17.4 ≤ T ≤ 85.8°C) and soluble solids content (11.0 ≤ X s ≤ 52.4 ºBrix). The Ostwald-de Waele (power law) model described well the rheological behavior. The friction factor for non-isothermal flow of pineapple juice in the PHE was obtained for diagonal and parallel/side flow. Experimental results were well correlated with the generalized Reynolds number (20 ≤ Re g ≤ 1230) and were compared with predictions from equations from the literature. The mean absolute error for pressure drop prediction was 4% for the diagonal plate and 10% for the parallel plate.

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Section: Density and Rheological Behaviormentioning

confidence: 99%

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

Cabral

Gut

Telis

et al. 2010

Braz. J. Chem. Eng.

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“…For example, the viscosity of the molasses can change under factors such as temperature, time and mass concentration . The high viscosity also limits the flows, interfering in the design of systems such as pipes, valves, pumps, heat exchangers and evaporators . Thus, the knowledge of the factors that influence them would be of value in optimizing these operations .…”

Section: Introductionmentioning

confidence: 99%

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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“…The flow velocity equation (11) is valid for fully undisturbulent flow in straight horizontal tubes. Real processing system contain many other elements such as valves, tees, elbows etc., which can cause mixing of fluid during flow [21][22][23][24]. In addition, pipe vibration caused by energy inputs from pumps may contribute to mixing.…”

Section: Resultsmentioning

confidence: 99%

Fluid dynamics of liquid egg products

et al. 2015

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The rheological behavior of liquid egg products (egg yolk, egg white, and whole liquid egg) was studied using a concentric cylinder viscometer. Eggs of three poultry specimens were used: hen (Isa Brown), Japanese quail (Coturnix japonica), and goose (Anser anser f. domestica). Rheological behavior was pseudoplastic and flow curves fitted by the power law model (Herschel-Bulkley and Ostwald-De Waele). The meaning of rheological parameters on friction factors and velocity profiles during flow of liquid egg products in tube has been shown.

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Friction Losses in Valves and Fittings for Viscoplastic Fluids

Cited by 13 publications

References 12 publications

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

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

Rheological behavior of molasses for application in industry

Fluid dynamics of liquid egg products

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