Ricardo S. Gomez
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View article: Non-Isothermal Process of Liquid Transfer Molding: Transient 3D Simulations of Fluid Flow Through a Porous Preform Including a Sink Term
Non-Isothermal Process of Liquid Transfer Molding: Transient 3D Simulations of Fluid Flow Through a Porous Preform Including a Sink Term Open
Resin Transfer Molding (RTM) is a widely used composite manufacturing process where liquid resin is injected into a closed mold filled with a fibrous preform. By applying this process, large pieces with complex shapes can be produced on an…
View article: Integration of Arc and Microstructural Analysis for Anomaly Detection in Walls Manufactured by GMA-Based WAAM
Integration of Arc and Microstructural Analysis for Anomaly Detection in Walls Manufactured by GMA-Based WAAM Open
Wire Arc Additive Manufacturing (WAAM) is a process for fabricating metal parts known for its high productivity and material flexibility. However, defects such as overheating, residual stresses, distortions, porosity, and a non-homogeneous…
View article: Development of Anemometer Based on Inertial Sensor
Development of Anemometer Based on Inertial Sensor Open
The current article elucidates a study centered on the development of an anemometer leveraging an inertial sensor for wind speed measurement in the northeast region of Brazil, focusing on renewable energy generation. The study encompassed …
View article: Drying of a Clayey Ceramic Flat Plate: Simulation Studies Using the Galerkin-Based Integral Method
Drying of a Clayey Ceramic Flat Plate: Simulation Studies Using the Galerkin-Based Integral Method Open
The ceramics sector is crucial to the global economy. This research is devoted to studying the drying process of ceramic parts with arbitrary shapes based on Fick’s second law of diffusion and energy conservation. Herein, the mathematical …
View article: Hydrodynamic Evaluation of a Filtering Hydrocyclone for Solid Particle/Water Separation
Hydrodynamic Evaluation of a Filtering Hydrocyclone for Solid Particle/Water Separation Open
A conventional hydrocyclones is a versatile equipment with a high processing capacity and low maintenance cost. Currently, several studies aim to alter the typical structure of the conventional hydrocyclone in order to modify its performan…
View article: A Novel Design of a Torsional Shape Memory Alloy Actuator for Active Rudder
A Novel Design of a Torsional Shape Memory Alloy Actuator for Active Rudder Open
SMA actuators are a group of lightweight actuators that offer advantages over conventional technology and allow for simple and compact solutions to the increasing demand for electrical actuation. In particular, an increasing number of SMA …
View article: The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study
The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study Open
Drying is a thermodynamic process in which the moisture contained in the solid is removed by evaporation through the supply of an appreciable amount of thermal energy. It is recognized as a critical and intricate stage in the manufacturing…
View article: Natural Ventilation in Low-Cost Housing: An Evaluation by CFD
Natural Ventilation in Low-Cost Housing: An Evaluation by CFD Open
With the spread of sustainability concepts, due to the global energy crisis and the unrestrained consumption of natural resources, the importance of rational use and reduction of energy consumption has been intensified, albeit in short ste…
View article: Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature
Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature Open
Drying is one of the stages with the highest energy consumption in the manufacturing process of ceramic materials and aims to reduce the product’s moisture to levels necessary for safe firing stage, reducing the chances of defect formation…
View article: Bio-Polyethylene Composites Based on Sugar Cane and Curauá Fiber: An Experimental Study
Bio-Polyethylene Composites Based on Sugar Cane and Curauá Fiber: An Experimental Study Open
For the purpose of renewable materials applications, Curauá fiber treated with 5% sodium hydroxide was added to high-density biopolyethylene, using an entirely Brazilian raw material of sugarcane ethanol. Polyethylene grafted with maleic a…
View article: Heat and Mass Transfer in Structural Ceramic Blocks: An Analytical and Phenomenological Approach
Heat and Mass Transfer in Structural Ceramic Blocks: An Analytical and Phenomenological Approach Open
The ceramic industry is one of the pillars of the Brazilian economy, characterized by making low-cost products and an obsolete manufacturing process from a technological point of view. Among the various stages of production of ceramic mate…
View article: Geometric and Thermo-Gravimetric Evaluation of Bananas during Convective Drying: An Experimental Investigation
Geometric and Thermo-Gravimetric Evaluation of Bananas during Convective Drying: An Experimental Investigation Open
Fresh bananas are fruits with high moisture content after harvest and are submitted to a drying process to minimize waste and increase shelf life. This work aims to experimentally study the convective drying of bananas in an oven with hot-…
View article: Investigating the Dialysis Treatment Using Hollow Fiber Membrane: A New Approach by CFD
Investigating the Dialysis Treatment Using Hollow Fiber Membrane: A New Approach by CFD Open
Due to the increase in the number of people affected by chronic renal failure, the demand for hemodialysis treatment has increased considerably over the years. In this sense, theoretical and experimental studies to improve the equipment (h…
View article: Thermal and Rheological Characterization of Recycled PET/Virgin HDPE Blend Compatibilized with PE-g-MA and an Epoxy Chain Extender
Thermal and Rheological Characterization of Recycled PET/Virgin HDPE Blend Compatibilized with PE-g-MA and an Epoxy Chain Extender Open
In this work, recycled poly(ethylene terephthalate) (PETR) was blended with virgin high-density polyethylene (HDPE) in an internal mixer in an attempt to obtain a material with improved properties. A compatibilizer (PE-g-MA) and a chain ex…
View article: Non-Equilibrium Thermodynamics-Based Convective Drying Model Applied to Oblate Spheroidal Porous Bodies: A Finite-Volume Analysis
Non-Equilibrium Thermodynamics-Based Convective Drying Model Applied to Oblate Spheroidal Porous Bodies: A Finite-Volume Analysis Open
Commonly based on the liquid diffusion theory, drying theoretical studies in porous materials has been directed to plate, cylinder, and sphere, and few works are applied to non-conventional geometries. In this sense, this work aims to stud…
View article: Drying of Sisal Fiber: A Numerical Analysis by Finite-Volumes
Drying of Sisal Fiber: A Numerical Analysis by Finite-Volumes Open
Vegetable fibers have inspired studies in academia and industry, because of their good characteristics appropriated for many technological applications. Sisal fibers (Agave sisalana variety), when extracted from the leaf, are wet and must …
View article: Hydrodynamic and Performance Evaluation of a Porous Ceramic Membrane Module Used on the Water–Oil Separation Process: An Investigation by CFD
Hydrodynamic and Performance Evaluation of a Porous Ceramic Membrane Module Used on the Water–Oil Separation Process: An Investigation by CFD Open
Wastewater from the oil industry can be considered a dangerous contaminant for the environment and needs to be treated before disposal or re-use. Currently, membrane separation is one of the most used technologies for the treatment of prod…
View article: Oily Water Separation Process Using Hydrocyclone of Porous Membrane Wall: A Numerical Investigation
Oily Water Separation Process Using Hydrocyclone of Porous Membrane Wall: A Numerical Investigation Open
This research aims to study the process of separating water contaminated with oil using a hydrocyclone with a porous wall (membrane), containing two tangential inlets and two concentric outlets (concentrate and permeate), at the base of th…
View article: Oily Water Treatment by Ceramic Membrane: Modeling and Simulation
Oily Water Treatment by Ceramic Membrane: Modeling and Simulation Open
The separation process of oily water using membranes has attracted the attention of researchers and engineers. The greater problem in the use of membrane separation process is the reduction in permeate flux due to clogged pores by oil depo…
View article: Secagem de tijolos cerâmicos industriais e estimativa de parâmetros do processo: uma abordagem concentrada avançada
Secagem de tijolos cerâmicos industriais e estimativa de parâmetros do processo: uma abordagem concentrada avançada Open
Este trabalho objetiva estudar a secagem de sólidos porosos e com forma arbitraria usando o método da análise concentrada. Um modelo matemático fenomenológico avançado baseado numa análise concentrada e sua solução exata são apresentados p…
View article: Transferência de calor em Reator Cilíndrico Elíptico de leito fixo via modelo heterogêneo: efeito da forma das partículas do leito poroso
Transferência de calor em Reator Cilíndrico Elíptico de leito fixo via modelo heterogêneo: efeito da forma das partículas do leito poroso Open
O objetivo deste trabalho foi estudar a transferência de calor em um reator cilíndrico elíptico de leito recheado de partículas. Foi desenvolvido um modelo matemático heterogêneo (modelo de duas fases), aplicado para as fases sólida e flui…
View article: Heat and Mass Transfer on the Microwave Drying of Rough Rice Grains: An Experimental Analysis
Heat and Mass Transfer on the Microwave Drying of Rough Rice Grains: An Experimental Analysis Open
This work aims to experimentally study the drying of agricultural products using microwaves, with particular reference to grains. Microwave drying experiments were carried out with paddy rice grains in natura (BRSMG Conai variety) for thre…
View article: Modelagem e simulação de escoamento anular de água, óleo pesado e ar em dutos horizontais
Modelagem e simulação de escoamento anular de água, óleo pesado e ar em dutos horizontais Open
Este artigo tem como objetivo estudar o escoamento trifásico água – óleo pesado – ar em dutos horizontais, utilizando a técnica “core annular flow”. O modelo matemático utilizado foi o não-homogêneo, numa abordagem Euleriana – Euleriana. C…
View article: Thermal analysis in an air conditioning duct: An experimental design approach
Thermal analysis in an air conditioning duct: An experimental design approach Open
The main purpose of this work is to perform a thermal analysis in an air conditioning duct to verify the influence of the thermal properties of the insulating material on the minimum thermal insulation thickness necessary to avoid the cond…
View article: Análise do processo de separação óleo-água em hidrociclones via CFD
Análise do processo de separação óleo-água em hidrociclones via CFD Open
Hidrociclones são equipamentos usados em processos de separação óleo-água. São considerados eficientes, compactos, seguros, de simples construção e manutenção, e baixo custo, quando comparados a outros equipamentos de semelhante aplicação.…
View article: A New Design of Tubular Ceramic Membrane Module for Oily Water Treatment: Multiphase Flow Behavior and Performance Evaluation
A New Design of Tubular Ceramic Membrane Module for Oily Water Treatment: Multiphase Flow Behavior and Performance Evaluation Open
Petroleum has been extracted from oil reservoirs using different techniques. This activity is accompanied for a large amount of water and sometimes mixed with gas. This produced water has a high oil concentration and other toxic chemical c…
View article: Processo de secagem de materiais cerâmicos argilosos: uma revisão
Processo de secagem de materiais cerâmicos argilosos: uma revisão Open
A secagem é uma operação de transferência de calor e massa envolvendo a remoção de umidade, sendo uma etapa importante e de elevado custo no processo de manufatura de diversos produtos. Para materiais cerâmicos, o processo de secagem é nec…
View article: Estudo teórico e experimental da secagem de banana inteira em estufa
Estudo teórico e experimental da secagem de banana inteira em estufa Open
Bananas frescas são frutas com elevado teor de umidade após a colheita, e são submetidas ao processo de secagem para minimizar desperdício e a deterioração, e aumentar a vida de prateleira. Este trabalho apresenta um estudo de secagem de b…
View article: Secagem de materiais cerâmicos argilosos com forma complexa: uma análise teórica usando o método da capacitância global
Secagem de materiais cerâmicos argilosos com forma complexa: uma análise teórica usando o método da capacitância global Open
A necessidade de investimento na melhoria de qualidade, produtividade, redução de custos e economia de energia de processo é uma preocupação crescente do setor ceramista. O processo de secagem consiste na remoção de umidade de um material …
View article: Secagem de tijolos cerâmicos argilosos industriais: uma investigação teórica usando modelos concentrados
Secagem de tijolos cerâmicos argilosos industriais: uma investigação teórica usando modelos concentrados Open
Este trabalho apresenta um estudo teórico da transferência de calor e massa durante a secagem de tijolos cerâmicos industriais em estufa. Foram propostos modelos matemáticos para descrever as cinéticas de secagem e aquecimento do tijolo em…