期刊
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
卷 131, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.icheatmasstransfer.2021.105787
关键词
Complex tapes; Nanomaterial; Cooling; Heat transfer
资金
- Deanship of Scientific Research at King Khalid University [RGP.1/154/42]
- Weifang University of Science and Technology Discipline Construction Blockchain Special Project [021XKJS10]
Multi tapes were recommended as a promising technique for enhancing cross section flow in the current context. By adding copper oxide nano powders, the type of carrier fluid was changed and applying tapes and nanoparticles in the pipe can increase the residence time and enhance cooling rate. The pressure loss and S-gen,S-f increase with the growth of b and Re, while the increase of b leads to a reduction in S-gen,S-th.
In current context, applying multi tapes were recommended as promising technique for augmentation cross section flow. Type of carrier fluid was changed with adding copper oxide nano powders with fraction of 0.04. Residence time improves with applying tapes and nanoparticles pass longer path inside the pipe. Gravity has no impact in momentum equation due to high velocity and owing to presence swirl flow device; k-epsilon technique was applied. For verification, empirical formula for estimating Nu was involved. Recirculation zone augment as b increases and stronger secondary flow generates thinner layer near the surface and make it cooler. Greater pressure loss is an output of more interaction of nanomaterial with solid surfaces and this phenomenon occurs in existence of tapes. Owing to longer paths of nano particles, pressure loss augments with growth of b and Re. Cooling rate enhances about 3.77% and 128.9% with rise of b and Re. Growth of Re enhances the increasing trend of S-gen,S-f. This function augments about 64.41% with rise of b at highest Re. Also, growth of b leads to reduction in S-gen,S-th about 3.09%.
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