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Colin S, Fernández JM, Barrot C, Baldas L, Bajić S, Rojas-Cárdenas M. Review of Optical Thermometry Techniques for Flows at the Microscale towards Their Applicability to Gas Microflows. MICROMACHINES 2022; 13:1819. [PMID: 36363841 PMCID: PMC9694003 DOI: 10.3390/mi13111819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/11/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Thermometry techniques have been widely developed during the last decades to analyze thermal properties of various fluid flows. Following the increasing interest for microfluidic applications, most of these techniques have been adapted to the microscale and some new experimental approaches have emerged. In the last years, the need for a detailed experimental analysis of gaseous microflows has drastically grown due to a variety of exciting new applications. Unfortunately, thermometry is not yet well developed for analyzing gas flows at the microscale. Thus, the present review aims at analyzing the main currently available thermometry techniques adapted to microflows. Following a rapid presentation and classification of these techniques, the review is focused on optical techniques, which are the most suited for application at microscale. Their presentation is followed by a discussion about their applicability to gas microflows, especially in confined conditions, and the current challenges to be overcome are presented. A special place is dedicated to Raman and molecular tagging thermometry techniques due to their high potential and low intrusiveness.
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Affiliation(s)
- Stéphane Colin
- Institut Clément Ader (ICA), Université de Toulouse, CNRS-INSA-ISAE-Mines Albi-UPS, 31400 Toulouse, France
- Fédération de recherche FERMAT, CNRS, 31400 Toulouse, France
| | - José M. Fernández
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia IEM-CSIC, 28006 Madrid, Spain
| | - Christine Barrot
- Institut Clément Ader (ICA), Université de Toulouse, CNRS-INSA-ISAE-Mines Albi-UPS, 31400 Toulouse, France
- Fédération de recherche FERMAT, CNRS, 31400 Toulouse, France
| | - Lucien Baldas
- Institut Clément Ader (ICA), Université de Toulouse, CNRS-INSA-ISAE-Mines Albi-UPS, 31400 Toulouse, France
- Fédération de recherche FERMAT, CNRS, 31400 Toulouse, France
| | - Slaven Bajić
- Institut Clément Ader (ICA), Université de Toulouse, CNRS-INSA-ISAE-Mines Albi-UPS, 31400 Toulouse, France
- Fédération de recherche FERMAT, CNRS, 31400 Toulouse, France
| | - Marcos Rojas-Cárdenas
- Institut Clément Ader (ICA), Université de Toulouse, CNRS-INSA-ISAE-Mines Albi-UPS, 31400 Toulouse, France
- Fédération de recherche FERMAT, CNRS, 31400 Toulouse, France
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Editorial for the Special Issue "Selected Papers from the ISTEGIM'19-Thermal Effects in Gas Flow in Microscale". MICROMACHINES 2020; 11:mi11090879. [PMID: 32967349 PMCID: PMC7570001 DOI: 10.3390/mi11090879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 09/18/2020] [Indexed: 11/16/2022]
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