Melting heat transfer in rectangular cavity filled with ice slurry heated from below
Ice slurry is a homogeneous mixture of small ice particles and a carrier liquid. It is widely used in many fields. Previous studies have gradually clarified its heat transfer in high ice packing factor (IPF). However, only a few studies have focused on the mechanism of heat transfer with low IPF in...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2019-12-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/14/3/14_2019jfst0021/_pdf/-char/en |
| _version_ | 1819364626648793088 |
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| author | Taimei MIYAGAWA Takahiro OKABE Takuro MIYANISHI Takuma KOGAWA Hiroyuki MURATA Koji FUMOTO |
| author_facet | Taimei MIYAGAWA Takahiro OKABE Takuro MIYANISHI Takuma KOGAWA Hiroyuki MURATA Koji FUMOTO |
| author_sort | Taimei MIYAGAWA |
| collection | DOAJ |
| description | Ice slurry is a homogeneous mixture of small ice particles and a carrier liquid. It is widely used in many fields. Previous studies have gradually clarified its heat transfer in high ice packing factor (IPF). However, only a few studies have focused on the mechanism of heat transfer with low IPF in a cavity heated from below. The objective of this study is to experimentally clarify the melting heat transfer of ice slurry in a cavity heated from below with low IPF to develop a direct contact medical cooling system. To observe the melting behavior of ice slurry, the test section was made of acrylic resin (100 mm × 60 mm× 30 mm) and a silicone rubber heater that was used for heating under constant heat flux conditions. We measured the surface temperature of the heater and the liquid thickness. We showed that the melting process can be divided into three stages. In the first stage, heat conduction dominated the process of heat transfer and the temperature of the heater rapidly increased. In the second stage, natural convection heat transfer dominated the process of heat transfer that increased the melting rate of ice slurry and decreased the temperature of the heater. In the third stage, heat conduction dominated the process of heat transfer in the concentration stratification. This led to a decrease in the melting rate and an increase in the temperature of the heater. Our result also showed that the melting process of the ice slurry is slow enough to consider it the quasi-steady state in the range of 104 < Ra* < 107 as compared to the development of the velocity and temperature fields. |
| first_indexed | 2024-12-24T23:01:56Z |
| format | Article |
| id | doaj.art-bc7170403a30487889820eee36d34ce3 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-24T23:01:56Z |
| publishDate | 2019-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-bc7170403a30487889820eee36d34ce32022-12-21T16:35:06ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582019-12-01143JFST0021JFST002110.1299/jfst.2019jfst0021jfstMelting heat transfer in rectangular cavity filled with ice slurry heated from belowTaimei MIYAGAWA0Takahiro OKABE1Takuro MIYANISHI2Takuma KOGAWA3Hiroyuki MURATA4Koji FUMOTO5Graduate School of Science and Technology, Hirosaki UniversityGraduate School of Science and Technology, Hirosaki UniversityGraduate School of Science and Technology, Hirosaki UniversityNational Institute of Technology, Hachinohe CollegeGraduate School of Science and Technology, Hirosaki UniversityDepartment of Mechanical Engineering, Aoyama Gakuin UniversityIce slurry is a homogeneous mixture of small ice particles and a carrier liquid. It is widely used in many fields. Previous studies have gradually clarified its heat transfer in high ice packing factor (IPF). However, only a few studies have focused on the mechanism of heat transfer with low IPF in a cavity heated from below. The objective of this study is to experimentally clarify the melting heat transfer of ice slurry in a cavity heated from below with low IPF to develop a direct contact medical cooling system. To observe the melting behavior of ice slurry, the test section was made of acrylic resin (100 mm × 60 mm× 30 mm) and a silicone rubber heater that was used for heating under constant heat flux conditions. We measured the surface temperature of the heater and the liquid thickness. We showed that the melting process can be divided into three stages. In the first stage, heat conduction dominated the process of heat transfer and the temperature of the heater rapidly increased. In the second stage, natural convection heat transfer dominated the process of heat transfer that increased the melting rate of ice slurry and decreased the temperature of the heater. In the third stage, heat conduction dominated the process of heat transfer in the concentration stratification. This led to a decrease in the melting rate and an increase in the temperature of the heater. Our result also showed that the melting process of the ice slurry is slow enough to consider it the quasi-steady state in the range of 104 < Ra* < 107 as compared to the development of the velocity and temperature fields.https://www.jstage.jst.go.jp/article/jfst/14/3/14_2019jfst0021/_pdf/-char/enice slurrymelting heat transfernatural convectionmelting behaviorimage processing |
| spellingShingle | Taimei MIYAGAWA Takahiro OKABE Takuro MIYANISHI Takuma KOGAWA Hiroyuki MURATA Koji FUMOTO Melting heat transfer in rectangular cavity filled with ice slurry heated from below Journal of Fluid Science and Technology ice slurry melting heat transfer natural convection melting behavior image processing |
| title | Melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| title_full | Melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| title_fullStr | Melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| title_full_unstemmed | Melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| title_short | Melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| title_sort | melting heat transfer in rectangular cavity filled with ice slurry heated from below |
| topic | ice slurry melting heat transfer natural convection melting behavior image processing |
| url | https://www.jstage.jst.go.jp/article/jfst/14/3/14_2019jfst0021/_pdf/-char/en |
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