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Influence of Anisotropic Permeability and Soret Effect on the Convective Heat and Mass Transfer through a Porous Cavity Saturated by a Non-Newtonian Fluid

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Engineering（科研） 2023年第12期15卷 843-866页

作者： dieudonné kouke Julien Yovogan Laboratoire d’Energétique et de Mécanique Appliquées LEMA-EPAC Université d’Abomey Calavi Cotonou Bénin Université Nationale des Sciences Technologies Ingénierie et Mathématiques Abomey Bénin

In this work, an analytical study is carried out on double-diffusive natural convection through a horizontal anisotropic porous layer saturated with a non-Newtonian fluid by using the Darcy model with the Boussinesq approximations. The horizontal walls of the system are subject to vertical uniform fluxes of heat and mass, whereas the vertical walls are assumed to be adiabatic and impermeable. The Soret effect is taken into consideration. Based on parallel flow approximation theory, the problem is solved in the limit of a thin layer and documented the effects of the physical parameters describing this investigation.

关键词： Soret Number Heat and Mass Transfer Non-Newtonian Fluid Isotropy Ani-sotropy Supercritical Rayleigh Number

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Implementation of the Acclimatization Process for Ginger Plantlets (Zingiber officinale Roscoe)

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Open Journal of Applied Sciences 2024年第8期14卷 2236-2248页

作者： Florentin Danton Kango Gilles Habib Todjro Cacaï Serge Sètondji Houédjissin Jerome Anani Hounguè Jaures Riwan Uriel kouke David Dègbé Allotchémè Corneille Ahanhanzo Central Laboratory of Plant Biotechnology and Plant Breeding Department of Genetic and Biotechnology Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin

Ginger (Zingiber officinale Roscoe) is an important culinary and medicinal spice but is rarely cultivated due to the unavailability of seeds. Given the difficulties in adapting to plantlets produced in natural environments, it is important to analyze the survival conditions of ginger plantlets. For this reason, we varied the incubation temperature and humidity as well as the substrate during the weaning phase. Then, we varied the nutrients contained in the watering solution during the hardening phase. The statistical analysis showed that physical factors and substrates significantly influenced (p < 0.0001) plantlet survival. Nutrient solutions significantly influenced the phylogenesis, rhizogenesis, and height growth of the plantlets. The suitable physical factors for good development of plantlets are a temperature of 26.54˚C and a humidity of 96.16%. The 1C2T2TC substrate (1 Compost + 2 Soil + 2 Coconut Peat) had a significant survival rate of approximately 92.5%. During hardening, the Plantzym solution promoted good growth in terms of plantlet height (0.6 cm) and good development of roots (30 roots) and leaves (03 leaves). This work will make it possible to develop a technical seed production sheet for better development of ginger cultivation in Benin.

关键词： Acclimatization Zingiber officinale Weaning Nutrient Solutions Substrates

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