Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow)
A micro-machined thermal flow sensor called “Flow Vector Sensor (FVS)” can measure an airflow speed and its direction simultaneously. The FVS is extremely small, and hence it does not disturb flowfields around the sensor. In addition, since a response time of the FVS is very short, the FVS can measu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2021-09-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/87/902/87_21-00110/_pdf/-char/en |
| _version_ | 1797989073413996544 |
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| author | Kumpei YOSHIDA Yoshimitsu KANAOKA Shigeo KIMURA Takahiro KIWATA Nobuyoshi KOMATSU |
| author_facet | Kumpei YOSHIDA Yoshimitsu KANAOKA Shigeo KIMURA Takahiro KIWATA Nobuyoshi KOMATSU |
| author_sort | Kumpei YOSHIDA |
| collection | DOAJ |
| description | A micro-machined thermal flow sensor called “Flow Vector Sensor (FVS)” can measure an airflow speed and its direction simultaneously. The FVS is extremely small, and hence it does not disturb flowfields around the sensor. In addition, since a response time of the FVS is very short, the FVS can measure unsteady flows. Therefore, the FVS is expected to be applied to flowfields over various objects such as automobiles. However, when the airflow speed is high, the sensitivity of the prototype of the FVS tends to be lower. In this study, we numerically examine heat transfer from the FVS to the airflow, in order to improve the sensitivity of the FVS in a high-speed airflow. First, we investigate the heat balance between the FVS and surroundings, in order to identify the cause of the lower sensitivity of the FVS. The heat transfer between the FVS and airflows is found to affect the sensitivity of the FVS, especially in the high-speed airflow. Second, we examine the effect of the size of the FVS, in order to discuss the design philosophy of the FVS. The heat transfer from the FVS to airflows is found to decrease with decreasing the size. Consequently, the small size of the FVS can improve the sensitivity of the FVS. These results should provide new insights into the design philosophy of a high performance FVS. |
| first_indexed | 2024-04-11T08:14:26Z |
| format | Article |
| id | doaj.art-0cf6c34d5f1e4b55995dfafec031747e |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:14:26Z |
| publishDate | 2021-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-0cf6c34d5f1e4b55995dfafec031747e2022-12-22T04:35:14ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612021-09-018790221-0011021-0011010.1299/transjsme.21-00110transjsmeThree-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow)Kumpei YOSHIDA0Yoshimitsu KANAOKA1Shigeo KIMURA2Takahiro KIWATA3Nobuyoshi KOMATSU4Graduate School of Natural Science and Technology, Kanazawa UniversityYAZAKI CorporationFaculty of Production Systems Engineering and Sciences, Komatsu UniversityInstitute of Natural Science and Technology, Kanazawa UniversityInstitute of Natural Science and Technology, Kanazawa UniversityA micro-machined thermal flow sensor called “Flow Vector Sensor (FVS)” can measure an airflow speed and its direction simultaneously. The FVS is extremely small, and hence it does not disturb flowfields around the sensor. In addition, since a response time of the FVS is very short, the FVS can measure unsteady flows. Therefore, the FVS is expected to be applied to flowfields over various objects such as automobiles. However, when the airflow speed is high, the sensitivity of the prototype of the FVS tends to be lower. In this study, we numerically examine heat transfer from the FVS to the airflow, in order to improve the sensitivity of the FVS in a high-speed airflow. First, we investigate the heat balance between the FVS and surroundings, in order to identify the cause of the lower sensitivity of the FVS. The heat transfer between the FVS and airflows is found to affect the sensitivity of the FVS, especially in the high-speed airflow. Second, we examine the effect of the size of the FVS, in order to discuss the design philosophy of the FVS. The heat transfer from the FVS to airflows is found to decrease with decreasing the size. Consequently, the small size of the FVS can improve the sensitivity of the FVS. These results should provide new insights into the design philosophy of a high performance FVS.https://www.jstage.jst.go.jp/article/transjsme/87/902/87_21-00110/_pdf/-char/enmemsthermal flow sensorflow vector sensorheat transfernumerical simulation |
| spellingShingle | Kumpei YOSHIDA Yoshimitsu KANAOKA Shigeo KIMURA Takahiro KIWATA Nobuyoshi KOMATSU Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) Nihon Kikai Gakkai ronbunshu mems thermal flow sensor flow vector sensor heat transfer numerical simulation |
| title | Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) |
| title_full | Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) |
| title_fullStr | Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) |
| title_full_unstemmed | Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) |
| title_short | Three-dimensional simulation of heat transfer in a microscale flow vector sensor (Numerical study toward improving the sensitivity of the sensor in a high-speed airflow) |
| title_sort | three dimensional simulation of heat transfer in a microscale flow vector sensor numerical study toward improving the sensitivity of the sensor in a high speed airflow |
| topic | mems thermal flow sensor flow vector sensor heat transfer numerical simulation |
| url | https://www.jstage.jst.go.jp/article/transjsme/87/902/87_21-00110/_pdf/-char/en |
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