Results 1 to 10 of about 30,159 (169)

Convective drying kinetics of osmotically pretreated papaya cubes [PDF]

Revista Brasileira de Engenharia Agrícola e Ambiental, 2020
This study assessed the fitting of mathematical models to the convective drying kinetics of osmotically pre-dehydrated papaya cubes. Papaya cubes were subjected to osmotic dehydration in sucrose solutions at 40 and 50 ºBrix, at temperatures of 50 and 60 ...
João P. de L. Ferreira, Deise S. de Castro, Inacia dos S. Moreira, Wilton P. da Silva, Rossana M. F. de Figueirêdo, Alexandre J. de M. Queiroz   +5 more
doaj   +1 more source

Indirect Diffusion Effect in Degenerate Reaction-Diffusion Systems [PDF]

SIAM Journal on Mathematical Analysis, 2020
In this work we study global well-posedness and large time behaviour for a typical reaction--diffusion system, which include degenerate diffusion, and whose non-linearities arise from chemical reactions. We show that there is an {\it indirect diffusion effect}, i.e. an effective diffusion for the non-diffusive species which is incurred by a combination
Amit Einav, Jeffrey J. Morgan, Bao Quoc Tang   +2 more
openaire   +3 more sources

Determination of moisture diffusivity and activation energy on fixed bed drying of red pepper (Capsicum annum) on convective solar drying

Advances in Food Science, Sustainable Agriculture, and Agroindustrial Engineering, 2021
Moisture diffusivity and activation energy are two important variables in a drying process to understand a certain product's drying behavior. This study aimed to determine the value of effective moisture diffusivity and the activation energy of red ...
Siti Asmaniyah Mardiyani, Sumardi Hadi Sumarlan, Bambang Dwi Argo, Amin Setyo Leksono   +3 more
doaj   +1 more source

The “Skin Effect” Assessment of Chloride Ingress into Concrete Based on the Identification of Effective and Apparent Diffusivity

Applied Sciences, 2022
The method of assessment of the “skin effect” for chloride ingress into concrete has been proposed, based on the inverse problem for the identification of at-surface variability of chloride diffusivity under fully saturated conditions.
Zbigniew Perkowski, Zofia Szweda
doaj   +1 more source

Artificial neural network modeling for drying kinetics of paddy using a cabinet tray dryer [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2023
The study of drying kinetics and characteristics of agricultural products is essential for drying time estimation, designing dryers, and optimizing the drying process.
Subramanyam Rajasekar, Narayanan Meyyappan   +1 more
doaj   +1 more source

Drying and color in punamuña leaves (Satureja boliviana)

Dyna, 2021
Drying allows water to be removed and food to be preserved, however, this operation can degrade color. Punamuña leaves are aromatic and used for medicinal purposes in the Peruvian Andes. This research aimed to determine and model the drying kinetics, the
David Choque-Quispe, Betsy Suri Ramos-Pacheco, Aydeé Marilú Solano-Reynoso, Carlos Alberto Ligarda-Samanez, Yudith Choque-Quispe, Diego Elio Peralta-Guevara, Yadyra Quispe-Quispe   +6 more
doaj   +1 more source

Calculating effective diffusivities in the limit of vanishing molecular diffusion [PDF]

Journal of Computational Physics, 2009
In this paper we study the problem of the numerical calculation (by Monte Carlo Methods) of the effective diffusivity for a particle moving in a periodic divergent-free velocity filed, in the limit of vanishing molecular diffusion. In this limit traditional numerical methods typically fail, since they do not represent accurately the geometry of the ...
Grigorios A. Pavliotis, Andrew M. Stuart, Konstantinos C. Zygalakis   +2 more
openaire   +3 more sources

Drying of porous media: an algorithm to determine effective parameters

Vietnam Journal of Science, Technology and Engineering, 2022
The drying process plays an important role in various industries such as chemical engineering, food, agriculture, and construction. The drying process is a complex one due to the phenomena of heat and mass transfer, which take place simultaneously.
Hong Thai Vu, Trung Dung Nguyen
doaj   +1 more source

Drying of Banana Pseudo-stem Fibers: Evaluation of Kinetic Models, Effective Diffusivity, Thermodynamic Properties, and Structural Characterization

Journal of Natural Fibers, 2022
Banana pseudo-stem fiber drying was studied in a vertical fixed-bed convective dryer (60, 75, and 90°C). Nine mathematical models were used to analyze the drying behavior and the effective moisture diffusivity, activation energy, and thermodynamic ...
Genardo Queiroz de Oliveira, Rafael Alves do Nascimento, Juliana Ferreira Costa, Elza Brandão Santana, Cristiane Maria Leal Costa, Nielson Fernando da Paixão Ribeiro   +5 more
doaj   +1 more source

Persistence effects in deterministic diffusion [PDF]

Physical Review E, 2009
In systems which exhibit deterministic diffusion, the gross parameter dependence of the diffusion coefficient can often be understood in terms of random walk models. Provided the decay of correlations is fast enough, one can ignore memory effects and approximate the diffusion coefficient according to dimensional arguments. By successively including the
Gilbert, Thomas, Sanders, Paul
openaire   +4 more sources