Gabriela Cantarelli Lopes

Gabriela Cantarelli Lopes

Universidade Federal de São Carlos

H-index: 11

Latin America-Brazil

About Gabriela Cantarelli Lopes

Gabriela Cantarelli Lopes, With an exceptional h-index of 11 and a recent h-index of 10 (since 2020), a distinguished researcher at Universidade Federal de São Carlos, specializes in the field of Fluidodinâmica Computacional, Separação Gás-Sólido, Tratamento de Efluentes, Engenharia Química.

His recent articles reflect a diverse array of research interests and contributions to the field:

NUMERICAL STUDY OF TURBULENCE ON DRAG COEFFICIENT DETERMINATION FOR PARTICLE AGGLOMERATES: Original scientific paper

Investigation of carbon steel particle collisions in dry and wet environments

Drag coefficient on particle agglomerates: a CFD study with experimental validation

Prediction of the bed expansion of a liquid fluidized bed bioreactor applied to wastewater treatment and biogas production

In-depth validation of unresolved CFD-DEM simulations of liquid fluidized beds

Implementation, validation and application of a lubrication force model in CFD-DEM simulations

Análise numérica de um leito fluidizado líquido usando o código aberto CFDM@ coupling

Study and modelling of flame propagation on the BML framework using STOKES= Estudo e modelagem da propagação de chamas pela abordagem BML utilizando o STOKES

Gabriela Cantarelli Lopes Information

University

Universidade Federal de São Carlos

Position

___

Citations(all)

367

Citations(since 2020)

250

Cited By

209

hIndex(all)

11

hIndex(since 2020)

10

i10Index(all)

12

i10Index(since 2020)

10

Email

University Profile Page

Universidade Federal de São Carlos

Gabriela Cantarelli Lopes Skills & Research Interests

Fluidodinâmica Computacional

Separação Gás-Sólido

Tratamento de Efluentes

Engenharia Química

Top articles of Gabriela Cantarelli Lopes

NUMERICAL STUDY OF TURBULENCE ON DRAG COEFFICIENT DETERMINATION FOR PARTICLE AGGLOMERATES: Original scientific paper

Authors

Ricardo Arbach Fernandes de Oliveira,Julio Henrique Zanata,Gabriela Cantarelli Lopes

Journal

Chemical Industry & Chemical Engineering Quarterly

Published Date

2024

Numerical simulations of the flow surrounding particle agglomerates were carried out using computational fluid dynamics to assess the ability of five RANS turbulence models to estimate the drag coefficient in particle agglomerates. Simulations were carried out in steady conditions for Reynolds numbers between 1 and 1500. Streamlines showed that symmetrical agglomerates present a velocity profile similar to the single sphere profile. Results showed that both Spalart-Allmaras and SST k-ω turbulence models could represent the flow profile in the regions near and far from the walls of the agglomerates and the wake region in the rear of the agglomerates. The RNG k-ε model showed poor quality in predicting the velocity profile and the drag coefficient. The drag coefficient obtained by simulations presented a trend better represented by the Tran-Cong model, also showing that deviations from the predictions decreased as the packing density of the agglomerate increased. The use of steady RANS simulations showed to be a feasible and efficient method to predict, with low computational cost, the drag coefficient in particle agglomerates. For the transition and turbulent flows, results presented good agreement, with deviations between-15% and 13%, while for lower Reynolds numbers, deviations varied between-25% and 5%.

Investigation of carbon steel particle collisions in dry and wet environments

Authors

Karla RB Melo,Thiago F de Pádua,Gabriela C Lopes

Journal

Brazilian Journal of Chemical Engineering

Published Date

2023/5/30

In particulate systems, energy dissipation in collisions is affected by the properties of the fluid and the particulate phases. When the fluid is a liquid, the dissipative effect is mainly attributed to the liquid viscosity, which can soften the particle collision. This effect is less pronounced in collisions in air. Although the type of fluid exerts a strong influence on energy dissipation, it cannot be considered the only factor. Consequently, it is necessary to investigate the effect of different parameters in the solid–gas and solid–liquid flow, separately. In this context, this paper evaluated collisions of steel particles in air and water from experiments in a pendulum-type experimental apparatus. The influence of the Stokes number and factors that constitute this dimensionless parameter, such as particle diameter and impact velocity, were investigated. The results were evaluated by the dimensionless dry and wet coefficients of restitution …

Drag coefficient on particle agglomerates: a CFD study with experimental validation

Authors

Ricardo Arbach F de Oliveira,Gabriela Cantarelli Lopes

Journal

Journal of the Brazilian Society of Mechanical Sciences and Engineering

Published Date

2023/9

The formation of irregularly shaped particle agglomerates is a recurring phenomenon observed in equipment with particle-laden flows, which directly interferes in the flow profile, due to drag effects. To observe the capability of computational fluid dynamics to predict the drag coefficient in particle agglomerates, laboratory experiments were performed, aiming the validation of simulations. Experimental assays were performed to obtain both the fluids’ properties and the terminal velocities of the particle agglomerates. To evaluate the drag coefficient, simulations were carried out at steady state for the experimental conditions and the results were compared. Simulations presented good agreement with the experimental assays, with most of deviations lower than ±10%. Simulations of the agglomerates of four and five particles falling in water presented higher deviations, 12.73% and 19.92%, respectively. Higher …

Prediction of the bed expansion of a liquid fluidized bed bioreactor applied to wastewater treatment and biogas production

Authors

Victor Oliveira Ferreira,Daniel Silva Junior,Karla Raphaela Braga de Melo,Bruno Blais,Gabriela Cantarelli Lopes

Journal

Energy Conversion and Management

Published Date

2023/8/15

The high potential of water treatment and biogas production systems using liquid fluidization is still underexplored. The design of this equipment is usually done using the simple Richardson-Zaki equation for bed expansion predictions, which is powerful but overlooks the interactions between fluid and particles. In this work, an alternative method based on a force balance on the bed and drag correlations to estimate the bed porosity was proposed. The accuracy of the methods was assessed by comparing bed porosity estimations with experiments carried out in a wide range of regimes (Reynolds numbers between 498 and 18664), using 7 different particles with various diameters (2.66 to 6.37 mm) and densities (1022 to 3585 kg/m3). On average, the fitting between the Richardson-Zaki equation and the experimental results was improved by 60% when the wall effects were considered. The alternative approach …

In-depth validation of unresolved CFD-DEM simulations of liquid fluidized beds

Authors

Victor O Ferreira,Toni El Geitani,Daniel Silva Junior,Bruno Blais,Gabriela C Lopes

Journal

Powder Technology

Published Date

2023/8/1

In this work, we assess the accuracy of the unresolved CFD-DEM method by confronting simulated and experimental results of a pilot-scale cylindrical liquid–solid fluidized bed. We used two types of particles with significantly different densities (1029 and 3586 kg m− 3), allowing for testing a wide range of flow regimes. Comparisons between experimental and simulated particles’ dynamics show that the Saffman lift force is essential in predicting the physical dispersion of particles, preventing unphysical plumes. Simulations precisely reproduced the overall force balance in the system. The bed expansion as a function of the inlet velocity results show excellent agreement between simulations and experiments. High agreement between experiments and simulations is observed for the drag models proposed by Di Felice, Rong, and Beetstra but not for Gidaspow. The results validate the use of unresolved CFD-DEM to …

Implementation, validation and application of a lubrication force model in CFD-DEM simulations

Authors

João PF Campos,Karla RB Melo,Gabriela C Lopes

Journal

Brazilian Journal of Chemical Engineering

Published Date

2021/7/21

Abstract Numerical simulations using CFD-DEM (Computational Fluid Dynamics—Discrete Elements Method) are used to investigate the hydrodynamic behavior of the phases in solid–liquid fluidized beds. However, some challenges are posed to the prediction of energy dissipation and bed expansion on these systems—little knowledge on the collision effects on the solid phase and the high computational cost of assessing the dissipative effects of the lubrication force resulting from the liquid phase. In this context, the present study assessed the collision effects based on the coefficient of restitution, the main parameter of contact between the particles, and the influence of the lubrication force on the dynamics of a fluidized bed. For this, a lubrication force model was implemented in an open-source software CFDEM®project. The model was tested for collisions with fluids of different viscosities and …

Análise numérica de um leito fluidizado líquido usando o código aberto CFDM@ coupling

Authors

Gabriela Cantarelli Lopes,Hugo Rodrigues Epifanio

Published Date

2021/3/18

Leitos fluidizados líquido-sólido são amplamente utilizados em uma série de processos industriais, tais como em filtros granulares, processos de cristalização, adsorção, troca iônica, floculação, eletrólise e biorreatores. As colisões partícula-partícula e partícula-parede possuem um papel crucial em escoamentos fluido-sólido, uma vez que podem afetar o acúmulo e dispersão das partículas e, consequentemente, a expansão do leito.

Study and modelling of flame propagation on the BML framework using STOKES= Estudo e modelagem da propagação de chamas pela abordagem BML utilizando o STOKES

Authors

Tássia Lins da Silva Quaresma

Published Date

2021

A modelagem numérica de explosões de gás no contexto da fluidodinâmica computacional (CFD) é uma importante ferramenta para predizer o comportamento da chama e suas consequências associadas. Esta importância é particularmente relevante na presença de obstáculos ou áreas altamente...Resumo: A modelagem numérica de explosões de gás no contexto da fluidodinâmica computacional (CFD) é uma importante ferramenta para predizer o comportamento da chama e suas consequências associadas. Esta importância é particularmente relevante na presença de obstáculos ou áreas altamente congestionadas, em que a geração de turbulência pode contribuir significativamente para a aceleração da chama. Na modelagem da combustão, os efeitos da turbulência na propagação das chamas são incorporados no termo fonte da taxa de reação. Nesse contexto, este trabalho se concentra na análise e no melhoramento dos modelos de reação química implementados no STOKES (Shock Towards Kinetic Explosion Simulator), um código de CFD desenvolvido por pesquisadores da Unicamp dedicado à simulação de explosões de gás em geometrias complexas. STOKES conta com o modelo Bray-Moss-Libby (BML) para o cálculo da taxa de reação turbulenta e um modelo de queima laminar representa o desenvolvimento inicial da chama. Modelos flamelet como o BML são altamente dependentes de constantes ajustadas. Isso representa um desafio à ampliação da aplicabilidade do STOKES, uma vez que é necessária a calibração das constantes dos modelos para todos os novos casos. De forma a endereçar essa questão …

A new correlation for the coefficient of restitution of particles with low mechanical resistance for modeling wastewater treatment biofilm reactors

Authors

Karla RB Melo,John R Grace,Gabriela C Lopes

Journal

Clean Technologies and Environmental Policy

Published Date

2021/4/5

Fluidized bed bioreactors are widely used in wastewater treatment applications. Such reactors employ gel beads or hard particles covered with a biofilm layer. These particles lose more energy due to deformation when they collide than particles with high mechanical resistance. This energy loss can result in heterogeneity in particle distribution, increasing the drag on them, which, if not considered properly, can lead to problems in reactor design and operation. Therefore, it is important to know how much energy is dissipated by particles with low mechanical strength during collisions. In this context, the coefficient of restitution of alginate particles synthesized using different cationic solutions was determined experimentally. The influence of the Young’s modulus, size and roughness of the particles, as well as the impact velocity, on the coefficient of restitution was investigated. Results indicate that the coefficient …

A coefficient of restitution model for particle–surface collision of particles with a wide range of mechanical characteristics

Authors

Karla RB Melo,Thiago F de Padua,Gabriela C Lopes

Journal

Advanced Powder Technology

Published Date

2021/12/1

The coefficient of restitution describes the energy dissipation resulting from particle-particle and particle–surface interactions in solid–fluid flows. The energy loss depends on the mechanical characteristics of the solid phase, therefore, to correctly predict the behavior of these systems it is necessary to use reliable coefficient values based on the properties of the particles. This paper investigated the energy dissipation in particle–surface collisions using 7 types of particles with a wide range of mechanical properties (Young's modulus between 1.38 × 104 and 2.83 × 109 Pa). Three empirical equations have been proposed to calculate the coefficient of restitution based on the impact velocity and the compressional wave velocity. The experimental results presented an inverse relation between the impact velocity and the coefficient of restitution. This effect was more pronounced for less elastic particles. The models …

A simple numerical method to simulate the flow through filter media: Investigation of different fibre allocation algorithms

Authors

Liliana de Luca Xavier Augusto,Paolo Tronville,José AS Gonçalves,Gabriela C Lopes

Journal

The Canadian Journal of Chemical Engineering

Published Date

2021/12

Flow patterns and pressure‐drop through three fine‐fibre air filter media were simulated using the lattice Boltzmann method. The geometry for the flow domain was two‐dimensional, with fibres having truncated log‐normal diameter distributions matching SEM photograph measurements on the actual media. The influence of the strategy in positioning the fibres inside the computational domain on the pressure drop of the filter media was investigated. Two different schemes were proposed to position the fibres into a cross section of the filter medium: a random distribution algorithm and the Mitchell's best candidate algorithm. Furthermore, no‐slip and free‐slip boundary conditions were tested for the fluid‐fibre interaction. The comparison between numerical and experimental data shows that the random allocation of fibres better predicted the filter media behaviour. Simulated data suggest that the free‐slip boundary …

Investigation of the Influence of Turbulence Models on Cough Droplet Evaporation: Comparing (SST) k-Ω, k-ε, and Reynolds Stress (RSM) Turbulence Models

Authors

Roman Thiele,Weimin Ma,Henryk Anglart

Published Date

2011/7/1

Despite many advances in computational fluid dynamics (CFD), heat transfer modeling and validation of code for liquid metal flows needs to be improved. This contribution aims to provide validation of several turbulence models implemented in OpenFOAM. 6 different low Reynolds number and 3 high Reynolds number turbulence models have been validated against experimental data for 3 different Reynolds numbers. The results show that most models are able to predict the temperature profile tendencies and that especially the k-ω-SST by Menter has good predictive capabilities. However, all turbulence models show deteriorating capabilities with decreasing Reynolds numbers. (author)

Numerical study on the hydrodynamics of a fluidized-bed of bioparticles in tapered bioreactors with square shape cross-section

Authors

Daniela M Koerich,Gabriela C Lopes,Leonardo M Rosa

Journal

Brazilian Journal of Chemical Engineering

Published Date

2020/3

There are several configurations of fluidized beds commonly used in wastewater treatment units. Often their hydrodynamics is challenging to be evaluated experimentally, or too complex to be predicted accurately with empirical correlations only. In the present study, the computational fluid dynamics technique was applied to evaluate the hydrodynamic behavior of a liquid–solid fluidized bed in tapered bioreactors. The simulations were run with OpenFOAM, and they were based on a 3D, transient, Eulerian–Eulerian two-phase approach coupled with a turbulence model. Different tapered bioreactor angles were considered in the study, and the results showed a decrease in flow velocity along with the height of the device. Moreover, the distribution of the bioparticles within the fluidized bed was not found to be uniform, and it changed with the angle. It was also observed that bioparticle collisions caused large velocity …

Liquid-liquid equilibrium for systems composed by biodiesel from Catolé oil (Syagrus cearensis)-methanol and glycerol

Authors

JOÃO INÁCIO SOLETTI

Journal

ISSN 1451-9372 (Print) ISSN 2217-7434 (Online) JANUARY-MARCH 2020

Published Date

2020/1

The biodiesel inclusion in the Brazilian energy matrix still faces challenges due to the lack of diversity of raw material and the high costs associated with the stages of production, purification and phase separation of the biofuel. In this work, the potential of Catolé (Syagrus cearensis) was evaluated as an alternative source for biodiesel production, through methyl transesterification by alkaline catalysis. Given the absence of reported data on this oilseed, the aim of the present paper is to characterize the oil and biodiesel in terms of density, kinematic viscosity, and acid value. A liquid-liquid equilibrium (LLE) study of Catolé biodiesel-methanol-glycerin systems at 298.15, 308.15 and 323.15 K at atmospheric pressure was also carried out. Results showed that Catolé seed oil is a viable alternative for biodiesel production, with parameters found in accordance with the quality standards and an ester yield of 97.1%. Ternary diagrams showed that the solubility of the components lowers at low temperatures. Tie-lines evidenced higher affinity of methanol with the glycerin-rich phase. Distribution and selectivity coefficients were determined and the Othmer-Tobias and Hand correlations were applied to verify the quality of the experimental data. The determination indices (> 0.97) proved the thermodynamic consistency of the data.

See List of Professors in Gabriela Cantarelli Lopes University(Universidade Federal de São Carlos)

Gabriela Cantarelli Lopes FAQs

What is Gabriela Cantarelli Lopes's h-index at Universidade Federal de São Carlos?

The h-index of Gabriela Cantarelli Lopes has been 10 since 2020 and 11 in total.

What are Gabriela Cantarelli Lopes's top articles?

The articles with the titles of

NUMERICAL STUDY OF TURBULENCE ON DRAG COEFFICIENT DETERMINATION FOR PARTICLE AGGLOMERATES: Original scientific paper

Investigation of carbon steel particle collisions in dry and wet environments

Drag coefficient on particle agglomerates: a CFD study with experimental validation

Prediction of the bed expansion of a liquid fluidized bed bioreactor applied to wastewater treatment and biogas production

In-depth validation of unresolved CFD-DEM simulations of liquid fluidized beds

Implementation, validation and application of a lubrication force model in CFD-DEM simulations

Análise numérica de um leito fluidizado líquido usando o código aberto CFDM@ coupling

Study and modelling of flame propagation on the BML framework using STOKES= Estudo e modelagem da propagação de chamas pela abordagem BML utilizando o STOKES

...

are the top articles of Gabriela Cantarelli Lopes at Universidade Federal de São Carlos.

What are Gabriela Cantarelli Lopes's research interests?

The research interests of Gabriela Cantarelli Lopes are: Fluidodinâmica Computacional, Separação Gás-Sólido, Tratamento de Efluentes, Engenharia Química

What is Gabriela Cantarelli Lopes's total number of citations?

Gabriela Cantarelli Lopes has 367 citations in total.

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