The Experts below are selected from a list of 16908 Experts worldwide ranked by ideXlab platform
Ferri Hassani - One of the best experts on this subject based on the ideXlab platform.
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intermittent freezing concept for energy saving in artificial ground freezing systems
Energy Procedia, 2017Co-Authors: Mahmoud A Alzoubi, Agus P Sasmito, Ali Madiseh, Ferri HassaniAbstract:Abstract The artificial ground freezing (AGF) system is widely used in underground mines, shaft sinking, civil, and tunneling applications for stabilization of underground structures, and for hydraulic sealing. This system, however, incurs intensive energy consumption that requires careful consideration of the design and operating parameters. This paper aims to introduce and demonstrate a novel concept of intermittent AGF system with the ultimate goal to reduce energy consumption while ensuring desired structural stability and hydraulic sealing. A validated two-dimensional model that considers conservation of mass, momentum, and energy is utilized to simulate the transient heat transfer between the freezing pipes and the Porous Soil structure. The results show that a significant reduction of up to 40% in the energy consumption per year can be achieved by implementing such concept whilst maintaining frozen body at desired level. Clearly, this concept shows potential for practical application – of course further improvement and optimization is required.
Joshua M. Pearce - One of the best experts on this subject based on the ideXlab platform.
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Open-Source Script for Design and 3D Printing of Porous Structures for Soil Science
'MDPI AG', 2021Co-Authors: Romain Bedell, Alaa Hassan, Anne-julie Tinet, Javier Arrieta-escobar, Delphine Derrien, Marie-france Dignac, Vincent Boly, Stéphanie Ouvrard, Joshua M. PearceAbstract:Three-dimensional (3D) printing in Soil science is relatively rare but offers promising directions for research. Having 3D-printed Soil samples will help academics and researchers conduct experiments in a reproducible and participatory research network and gain a better understanding of the studied Soil parameters. One of the most important challenges in utilizing 3D printing techniques for Soil modeling is the manufacturing of a Soil structure. Until now, the most widespread method for printing Porous Soil structures is based on scanning a real sample via X-ray tomography. The aim of this paper is to design a Porous Soil structure based on mathematical models rather than on samples themselves. This can allow Soil scientists to design and parameterize their samples according to their desired experiments. An open-source toolchain is developed using a Lua script, in the IceSL slicer, with graphical user interface to enable researchers to create and configure their digital Soil models, called monoliths, without using meshing algorithms or STL files which reduce the resolution of the model. Examples of monoliths are 3D-printed in polylactic acid using fused filament fabrication technology with a layer thickness of 0.20, 0.12, and 0.08 mm. The images generated from the digital model slicing are analyzed using open-source ImageJ software to obtain information about internal geometrical shape, porosity, tortuosity, grain size distribution, and hydraulic conductivities. The results show that the developed script enables designing reproducible numerical models that imitate Soil structures with defined pore and grain sizes in a range between coarse sand (from 1 mm diameter) to fine gravel (up to 12 mm diameter)
Pearce Joshua - One of the best experts on this subject based on the ideXlab platform.
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Open-Source Script for Design and 3D Printing of Porous Structures for Soil Science
'MDPI AG', 2021Co-Authors: Bedell Romain, Arrieta-escobar Javier, Derrien Delphine, Ouvrard Stéphanie, Hassan Alaa, Boly Vincent, Tinet Anne-julie, Dignac Marie-france, Pearce JoshuaAbstract:International audienceThree-dimensional (3D) printing in Soil science is relatively rare but offers promising directions for research. Having 3D-printed Soil samples will help academics and researchers conduct experiments in a reproducible and participatory research network and gain a better understanding of the studied Soil parameters. One of the most important challenges in utilizing 3D printing techniques for Soil modeling is the manufacturing of a Soil structure. Until now, the most widespread method for printing Porous Soil structures is based on scanning a real sample via X-ray tomography. The aim of this paper is to design a Porous Soil structure based on mathematical models rather than on samples themselves. This can allow Soil scientists to design and parameterize their samples according to their desired experiments. An open-source toolchain is developed using a Lua script, in the IceSL slicer, with graphical user interface to enable researchers to create and configure their digital Soil models, called monoliths, without using meshing algorithms or STL files which reduce the resolution of the model. Examples of monoliths are 3D-printed in polylactic acid using fused filament fabrication technology with a layer thickness of 0.20, 0.12, and 0.08 mm. The images generated from the digital model slicing are analyzed using open-source ImageJ software to obtain information about internal geometrical shape, porosity, tortuosity, grain size distribution, and hydraulic conductivities. The results show that the developed script enables designing reproducible numerical models that imitate Soil structures with defined pore and grain sizes in a range between coarse sand (from 1 mm diameter) to fine gravel (up to 12 mm diameter)
Cullen R Buie - One of the best experts on this subject based on the ideXlab platform.
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aerosol generation by raindrop impact on Soil
Nature Communications, 2015Co-Authors: Young Soo Joung, Cullen R BuieAbstract:Suspended dust and sea salt are currently considered to be two major sources of environmental aerosol particles. Here, Joung and Buie report another mechanism of aerosol generation from rainfall impact on Porous Soil surfaces, whereby elements can be delivered to the air.
Mahmoud A Alzoubi - One of the best experts on this subject based on the ideXlab platform.
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intermittent freezing concept for energy saving in artificial ground freezing systems
Energy Procedia, 2017Co-Authors: Mahmoud A Alzoubi, Agus P Sasmito, Ali Madiseh, Ferri HassaniAbstract:Abstract The artificial ground freezing (AGF) system is widely used in underground mines, shaft sinking, civil, and tunneling applications for stabilization of underground structures, and for hydraulic sealing. This system, however, incurs intensive energy consumption that requires careful consideration of the design and operating parameters. This paper aims to introduce and demonstrate a novel concept of intermittent AGF system with the ultimate goal to reduce energy consumption while ensuring desired structural stability and hydraulic sealing. A validated two-dimensional model that considers conservation of mass, momentum, and energy is utilized to simulate the transient heat transfer between the freezing pipes and the Porous Soil structure. The results show that a significant reduction of up to 40% in the energy consumption per year can be achieved by implementing such concept whilst maintaining frozen body at desired level. Clearly, this concept shows potential for practical application – of course further improvement and optimization is required.