The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange
The analysis of the influence of microhotplate size on the convective heat exchange of gas sen-sors is presented. It is demonstrated that there is a minimum size leading to the formation of convection heat exchange flow. Below this minimum, only the thermal conductivity of ambient air and IR radiati...
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MDPI AG
2024-04-01
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| author | Alexey Vasiliev Alexey Shaposhnik Oleg Kul |
| author_facet | Alexey Vasiliev Alexey Shaposhnik Oleg Kul |
| author_sort | Alexey Vasiliev |
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| description | The analysis of the influence of microhotplate size on the convective heat exchange of gas sen-sors is presented. It is demonstrated that there is a minimum size leading to the formation of convection heat exchange flow. Below this minimum, only the thermal conductivity of ambient air and IR radiation should be considered as channels for heat dissipation by microhotplate. This limit expression contains only fundamental constants of air, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>d</mi><mo>~</mo><mn>4</mn><mo>·</mo><mroot><mrow><mfrac bevelled="true"><mrow><mi>ν</mi><mo>·</mo><mi>D</mi></mrow><mrow><mi>g</mi></mrow></mfrac></mrow><mrow><mn>3</mn></mrow></mroot></mrow></semantics></math></inline-formula>, where ν is the kinematic viscosity of air, D is the diffusion coefficient, and g is the acceleration of free fall, d~0.5 cm. |
| format | Article |
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| institution | Kabale University |
| issn | 2504-3900 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-1eac15daa4064e5b8d21f9004b236dce2024-12-27T14:48:58ZengMDPI AGProceedings2504-39002024-04-0197115010.3390/proceedings2024097150The Role of Convection and Size Effects in Sensor Microhotplate Heat ExchangeAlexey Vasiliev0Alexey Shaposhnik1Oleg Kul2Laboratory of Sensor Systems, University “Dubna”, Universitetskaya Strt., 19, 141980 Dubna, RussiaDepartment of Chemistry, Voronezh State Agrarian University, Michurina Strt., 1, 394087 Voronezh, RussiaLLC “C-Component”, Tushinskaya Strt., 17, 125362 Moscow, RussiaThe analysis of the influence of microhotplate size on the convective heat exchange of gas sen-sors is presented. It is demonstrated that there is a minimum size leading to the formation of convection heat exchange flow. Below this minimum, only the thermal conductivity of ambient air and IR radiation should be considered as channels for heat dissipation by microhotplate. This limit expression contains only fundamental constants of air, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>d</mi><mo>~</mo><mn>4</mn><mo>·</mo><mroot><mrow><mfrac bevelled="true"><mrow><mi>ν</mi><mo>·</mo><mi>D</mi></mrow><mrow><mi>g</mi></mrow></mfrac></mrow><mrow><mn>3</mn></mrow></mroot></mrow></semantics></math></inline-formula>, where ν is the kinematic viscosity of air, D is the diffusion coefficient, and g is the acceleration of free fall, d~0.5 cm.https://www.mdpi.com/2504-3900/97/1/150microhotplaterole of convectionheat lossesthermal conductivity |
| spellingShingle | Alexey Vasiliev Alexey Shaposhnik Oleg Kul The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange Proceedings microhotplate role of convection heat losses thermal conductivity |
| title | The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange |
| title_full | The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange |
| title_fullStr | The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange |
| title_full_unstemmed | The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange |
| title_short | The Role of Convection and Size Effects in Sensor Microhotplate Heat Exchange |
| title_sort | role of convection and size effects in sensor microhotplate heat exchange |
| topic | microhotplate role of convection heat losses thermal conductivity |
| url | https://www.mdpi.com/2504-3900/97/1/150 |
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