Effect of temperature and mole fraction on viscosity and thermal conductivity of water and ethanol mixture

Zhang, Binglong; He, L.; Dong, Jinzhong; Liu, Shuiming

doi:10.1088/1755-1315/227/4/042048

Cited by 4 publications

(5 citation statements)

References 8 publications

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“…The viscosity of binary liquid mixtures can also be calculated using an adapted Jouyban and Acree model: , ln nobreak0em.25em⁡ η m ( T ) = x 1 × ln nobreak0em.25em⁡ η 1 ( T ) + x 2 × ln nobreak0em.25em⁡ η 2 ( T ) + x 1 × x 2 × ∑ j = 0 2 [ A v j × ( x 1 − x 2 ) j T ] where η m ( T ) is the viscosity of the mixture and η 1 ( T ), η 2 ( T ) are the viscosities, and x 1 and x 2 are the mole fraction of the pure components 1 and 2 at a temperature T . A vj represents the model parameters, which can be obtained from fitting the experimental data.…”

Section: Calculation Methods For the Density And Viscositymentioning

confidence: 99%

“…To determine the viscosity of mixtures, the transport property model 30 in Refprop is used and has the following expression (33) where the factor F η (T, ρ) for the mixture is given by (34) with (35) (36)…”

Section: Calculation Methods For Thementioning

confidence: 99%

“…The viscosity of binary liquid mixtures can also be calculated using an adapted Jouyban and Acree model: 34,35 (44…”

Section: Calculation Methods For Thementioning

confidence: 99%

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Density and Viscosity of Linear Siloxanes and Their Mixtures

et al. 2023

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Density and viscosity measurements are performed for ethanol, water, hexamethyldisiloxane (MM), octamethyltrisiloxane (MDM), decamethyltetrasiloxane (MD2M), and their mixtures (ethanol/water, MM/MDM, MM/MD2M, MDM/MD2M) at 100 kPa at different temperatures (293–423 K) and mixture compositions. To measure the density and viscosity, an IMETER measuring system with a combined dynamic and static force measurement method, a density meter with an oscillating U-tube measuring method, and a rheometer with a double-gap measuring system were used. The experimentally determined data for the pure substances show a very good agreement with literature data. However, there is a strong deviation of the mixture viscosity between max 7% for MM/MDM and 31% for MM/MD2M compared to Refprop v.10.0. In order to enable an improvement in the calculation of the density and viscosity for the mixtures, specific parameters for the Jouyban–Acree model are developed for all mixtures and thereby, a better description of the density and viscosity for the mixtures could be achieved.

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Section: Calculation Methods For the Density And Viscositymentioning

confidence: 99%

Section: Calculation Methods For Thementioning

confidence: 99%

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Density and Viscosity of Linear Siloxanes and Their Mixtures

et al. 2023

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“…In the simulation, ethanol-water mixture was assumed to be an ideal solution and to obey Raoult's law. Thermal properties used in the simulation were obtained (Kitajima et al, 2003;Zhang et al, 2019) and shown in Table 1. Droplet shape in this study was assumed to be constant in both contact angle and radius which were 30° and 2 mm respectively.…”

Section: Numerical Simulation Parametersmentioning

confidence: 99%

Refractive index and mole fraction field of the vapor evaporated from ethanol-water mixture droplet

Jonglearttrakull

FUSHINOBU

Kadonaga

2022

JTST

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In this study, effect of the ambient relative humidity on the vapor concentration of ethanol-water mixture droplet on PTFE substrate was observed. Ethanol-water mixtures were prepared at 100 vol% (pure ethanol), 75 vol%, 50 vol%, 25 vol%, and 0 vol% (Pure water) by ethanol volume fraction. Relative humidity inside the test chamber was controlled at 33%RH, 52%RH, and 75%RH using saturated salt solution technique. Vapor concentration field was acquired by both applying Abel inverse transform to the Schlieren image and simulating with OpenFOAM source code. Pure ethanol had smaller value of mole fraction at the center than ethanol water mixture which was similar to the refractive index field. Two peaks of the mole fraction value were observed at the side of droplet in the case of pure ethanol from the concentration field, which was due to the presence of the droplet that blocked the downward movement of the ethanol vapor which was heavier than air and forced it to horizontally move to the edge of the droplet. On the other hand, one peak at the middle was found in the case of ethanol-water mixtures. Comparison of the concentration field between experimental result and simulation showed consistency in pure ethanol case and deviation became larger as ethanol portion decreased. Results of pure water and low ethanol concentration case (25 vol%) were obtained from simulation alone due to the limitation of Z-type Schlieren.

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“…Although the non-equilibrium method represents a more sophisticated description of the condensation process, the equilibrium method can also lead to satisfying results and keeps the benefit of less computing time. Still, these approaches coexist, and different aspects and adjustments of the approaches are investigated in current literature [8,9].…”

Section: Introductionmentioning

confidence: 99%

Mixture Condensation of Ethanol/Water and Ethanol/Siloxane in a Vertical Double Pipe

Zimmermann

Lubos

Dagli

et al. 2023

Chemie Ingenieur Technik

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Eco‐friendly mixtures may substitute pure working fluids in thermodynamic cycle processes, yet the existing calculation approaches of mixture condensation are complex due to iterative procedures and multiple input data. To simplify condenser design, this project aims for a new calculation method of mixtures. On this behalf, experimental data for the condensation of ethanol/water and ethanol/octamethyltrisiloxane is provided within a wide composition range to identify the most influential parameters. Finally, a practical prediction method for heat transfer coefficients of mixtures is suggested.

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Effect of temperature and mole fraction on viscosity and thermal conductivity of water and ethanol mixture

Cited by 4 publications

References 8 publications

Density and Viscosity of Linear Siloxanes and Their Mixtures

Density and Viscosity of Linear Siloxanes and Their Mixtures

Refractive index and mole fraction field of the vapor evaporated from ethanol-water mixture droplet

Mixture Condensation of Ethanol/Water and Ethanol/Siloxane in a Vertical Double Pipe

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