Laser-induced alteration of microstructural and microscopic transport properties in porous materials: Experiment, modeling and analysis
| Autor: | João Victor Nicolini, Olga M.O. de Araujo, Robert Straka, Helen Conceição Ferraz, Keerti Vardhan Sharma, Frederico W. Tavares, Ricardo Tadeu Lopes |
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| Rok vydání: | 2018 |
| Předmět: |
Pulsed laser
Materials science Mechanical Engineering Pore scale 0208 environmental biotechnology Lattice Boltzmann methods 02 engineering and technology Laser Fluid transport 020801 environmental engineering law.invention Mechanics of Materials law Heat transfer lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Composite material Porous medium Porosity |
| Zdroj: | Materials & Design, Vol 155, Iss, Pp 307-316 (2018) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2018.06.002 |
| Popis: | Porous materials are of great importance in various industrial applications. Microscopic modifications in the pore structures of these materials can change their functional behavior. We treat Indiana limestone by lasers to modify its pore structures microscopically. Microcomputed tomography (micro-CT) of the treated samples reveal that pulsed Nd:YAG laser with energy 330 mJ increases open porosity of limestone by 15% and almost doubles the total porosity. This laser increases the limestone pore connectivity by 460%. High power CO2 laser increases the open porosity by 20% but it reduces the pore connectivity of limestone. Our findings show that pulsed laser beams induce high increase in porosity and connectivity. 3D pore scale modeling using Cascaded lattice Boltzmann method (CLBM) on a D3Q27 model shows that regions treated by pulsed Nd:YAG lasers exhibit enhanced fluid transport efficiency compared to untreated regions. The obtained results successfully demonstrate that lasers can be used to induce a well controlled heat transfer in porous materials directly enhancing their morphometric characteristics and microscopic fluid transport behavior. Keywords: Indiana limestone, X-ray micro-CT, Laser beam-rock interaction, VOI, Cascaded lattice Boltzmann method, Pore scale modeling |
| Databáze: | OpenAIRE |
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