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Journal of Flow Visualization and Image Processing

Publication de 4  numéros par an

ISSN Imprimer: 1065-3090

ISSN En ligne: 1940-4336

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.6 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.6 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00013 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

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DO THE INTRUSIVE PROBES ALTER THE CHARACTERISTIC LENGTH-SCALES OF NATURAL CONVECTION?

Volume 25, Numéro 3-4, 2018, pp. 207-228
DOI: 10.1615/JFlowVisImageProc.2018027287
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RÉSUMÉ

Initiation and development of natural convection patterns such as cylindrical rolls and hexagonal cells depend on the system length-scales and external surroundings. In this work, the influence of inserted thermocouple probes on buoyant flow fields during bottom cooled solidification is investigated, wherein the convective and anomalous region of 0-4°C in water evolves continuously by forming different recirculation patterns. The experiments, performed with the use of the Mach−Zehnder interferometer and particle image velocimetry (PIV) techniques for obtaining full-field temperature and flow fields, respectively, compare and contrast the thermal field and flow patterns in the presence and absence of inserted thermocouple probes. The temperature field measurements show that the presence of thermocouples, even though located close to the side walls, delayed the initiation of convection, whereas the flow characteristics clearly indicated a considerable change in the magnitude of velocities and their circulating patterns. The patterns indicated a distinct behavior of forming more stable hexagonal cells when the probes did not intrude into the convecting region. The Rayleigh−Benard linear stability analysis confirmed that the length-scale available for recirculation was modified by the presence of thermocouple probes. These observations were further corroborated with the help of PIV experimental images obtained from multiple projections. The study clearly emphasized the importance of nonintrusive measurements, and how assessments of critical Rayleigh numbers for buoyant flows can be deceiving when inserted probes are present.

CITÉ PAR
  1. Monde Aniket D., Chawla Oaj, Kumar Virkeshwar, Karagadde Shyamprasad, Chakraborty Prodyut R., Shrinkage induced flow during directional solidification of pure substance in a bottom cooled cavity: A study on flow reversal phenomena, Physics of Fluids, 32, 4, 2020. Crossref

  2. Kumar Virkeshwar, Abhishek G. S., Srivastava Atul, Karagadde Shyamprasad, On the mechanism responsible for unconventional thermal behaviour during freezing, Journal of Fluid Mechanics, 903, 2020. Crossref

  3. Kumar Virkeshwar, Srivastava Atul, Karagadde Shyamprasad, Role of microstructure and composition on natural convection during ternary alloy solidification, Journal of Fluid Mechanics, 913, 2021. Crossref

  4. Jha Ajit Kumar, Shukla Prashant, Ghosh Pradyumna, Free convection boundary layer correlations for a vertical plate with nonuniform heating, Numerical Heat Transfer, Part B: Fundamentals, 2022. Crossref

  5. Jha A.K., Shukla P., Khisti Pranav M, Ghosh Pradyumna, Yadav S.K., Investigation of onset of velocity transition in free convection over an inclined flat plate by PIV, Experimental Thermal and Fluid Science, 140, 2023. Crossref

  6. Jha Ajit Kumar, Shukla P. , Ghosh P. , Khisti Pranav , Dubey Abhinav , VISUALIZATION AND MEASUREMENT OF NATURAL CONVECTION BOUNDARY LAYER BY PARTICLE IMAGE VELOCIMETRY , Journal of Flow Visualization and Image Processing, 30, 2, 2023. Crossref

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