Comparative study of meteorological data analysis tools based on Sousse climate

Due to lack of meteorological data of several locations, so designers select a Typical Year Weather data which is close to study location. But this method gives incorrect prediction of climatic design condition because; it not represents accurate weather o f this location and not take account of climatic change. This paper aims in first step to evaluate conversion method of Real Time weather data using Ecotect Weather Manager. And in second step to evaluate efficiency of meteorological data analysis tools such as: Revit, Ecotect, GBS. For this study we opt for Sousse city location. The results for climatic design conditions show a great correlation between Revit and GBS tools but a difference in the results concerning Ecotect weather tool especially for distribution of wind frequency were also identified. Moreover, interaction of weather parameters is used to identify bioclimatic passive design strategies for sustainable construction.Peer ReviewedPostprint (published version

Convective Boundary Conditions Effect on Cylindrical Media with Transient Heat Transfer

Lattice Boltzmann method is used to solve inside a cylindrical cavity with convective boundary condition is highlighted in this paper. Because of its simple, stable, accurate, efficient and ease for parallelization, we use the thermal Single Relaxation Time Bhatnagar Gross Krook (SRT BGK) mesoscopic approach in order to solve the energy equation. Thermal fields are simulated using D2Q9 scheme. We introduce and demonstrate numerically some usual cases (Dirichlet, Newmann) of Boundary conditions (Bcs). After validation, we extend the present work to the convective case. At the wall of the cavity, the unknown Thermal Distribution Functions (TDF) are exposed to the bounce back concept which is determined consistently by one of the imposed BCs. An in-house Fortran 90 code is used to analyze a variety of BCs inside a two-dimensional cavity. In validation, obtained results highlight a good agreement with literature. The present study is extended to deal with convective boundary condition for conduction transfer problems inside an axisymmetric cylindrical media subjected to heat generation and Newman boundary conditions

Assessment of residential settlement planning in Medina, based on climate adaptability

The theme of World Habitat Day 2020 was Housing for All: “A Better Urban Future”. In light of this postulate, this study aims to determine the climate response of traditional urban morphology to the Sousse climate, which allows us to assess the effectiveness of ancient urban planning considered a model of low-energy and low-carbon. This study purposes to help future urban planners in the early phase of the project and preserve their urban heritage. Design strategies such as indoor and outdoor daylighting and different natural ventilation conditions were studied to assess ancient city planning. The results show that the grouped houses in linear blocks with courtyards promote natural ventilation, solar gain, and thermal comfort control. This self-contained, compact urban morphology is beneficial in the semi-arid climate; it reduces heat loss through the exterior envelope and creates a comfortable atmosphere inside and outside the block, especially in summer

Quantification par mesures optiques des fragments libérés lors de la thrombolyse ultrasonore

Une étude expérimentale in-vivo a été menée afin de caractériser l'effet d'ondes acoustiques focalisées de forte intensité sur une cible du sang humain coagulée en présence d'un écoulement. L'emploi d'une technique optique par ombroscopie et le traitement d'images enregistrées ont permis l'analyse des fragments libérés lors de la thrombolyse ultrasonore. Ces données ont été traitées pour déterminer la distribution de taille des résidus et leur comportement dynamique dans l'écoulement. Les résultats mettent en évidence l'activité de mélange généré par la cavitation ultrasonore

Thermal insulation potential of wood-cereal straws/plaster composite

Nowadays, it is important, even necessary, to develop building materials from renewable resources. In this context, the use of low-cost natural fibers in the manufacture and reinforcement of materials is of great interest from an economic and environmental point of view. Present paper investigated the use of plaster loaded with two untreated plant fibers, Wood Fiber (WF) and cereal Straw Fiber (SF), in order to use them in thermal insulation applications of buildings. Composite materials based on Wood Fiber Plaster (WFP), Straw Fiber Plaster (SFP) and Wood-cereal Straw plaster (WSFP) were prepared with varying densities (0 %; 5 %; 10 %; 15 %; 20 % by volume). Their thermo-physical characteristics were characterized from the chemical structure (FTIR), crystallinity (XRD), thermal conductivity (Hot Box Method), thermal diffusivity (Flash Method) and the water uptake (ASTM D570) point of views. Two linear correlations concerning thermal conductivity and thermal diffusivity of WSFP, WFP and SFP samples have been established. Results show that the incorporation of wood fibers and cereal straw fibers reduce the thermal conductivity as well as thermal capacity, effusivity and the weight of composite materials. The comparison between other composite materials show that proposed composite is good competitor vs. materials used in insulation

Lattice Boltzmann Simulation for Flow Inside Open-Ended Porous Medium With Partially Thermally Active Walls

International audienceFree convection heat transfer and flow characteristics in an open-ended enclosure occupied with fluid saturated porous media are highlighted in this paper. All numerical investigations are achieved using the mesoscopic approach thermal Lattice Boltzmann Method (LBM) by using the Darcy-Forchheimer model. The bottom and the top sides of the porous enclosure is thermally isolated with complete or partially heated vertical wall facing the opening sidewall. The partial slice of left wall of the enclosure with a fixed heating length as (H/3) is isothermally heated at the middle, top and bottom locations. However, right side is open to the ambient physical conditions. The influences of partial heating location on free convection characteristics, namely, isotherms, streamlines, centerline variations of horizontal and vertical, average and local Nusselt numbers are explored for Darcy number of 0.01, porosity of 0.4, Rayleigh number of 106 and unity Prandtl number

Enthalpic lattice Boltzmann formulation for heat conduction during melting of PCMs with embedded solid blocks with different thermophysical properties

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