Study of Dynamic Fields in an Enclosure with Two Openings Heated by a Cylindrical Heat Source

Christian Anicet Koueni Toko
Additional contact information
Christian Anicet Koueni Toko: University of Maroua, Cameroon

European Journal of Engineering and Technology Research, 2025, vol. 10, issue 3, 15-30

Abstract: The objective of this work is to understand and predict the gas flows generated in an enclosure with an aspect ratio H/L= 0.83, having 02 openings located at the floor level and heated by a linear solid heat source. 02 enclosures Case 23 and Case 21 were studied. In these enclosures the openings are symmetrical and of the same sections. In the enclosure Case 23, the heat source is 3 mm above the floor and located at the position x+ = 0. In the enclosure Case 21, the heat source is at the position x+ = 0.24. The numerical computations of the velocity fields, pressure fields and mass flow rates will be carried out using the Direct Numerical Simulation (DNS) method and considering that a constant temperature is initially imposed on the heat source, that the enclosure is in thermal equilibrium with the outside and that there is no movement of gases at the openings. The results show that in the Case 23 enclosure, the velocity plume is turbulent and centered while in the Case 21 enclosure the velocity plume is strongly deflected near the side wall located at x+ = 0.5. This deviation can be due to the Couanda effect. In the Case 23 and Case 21 enclosures, we observe on each opening an incoming mass flow of fresh air and an outgoing mass flow of hot gases. Part of the hot gas flows descending towards the floor of the enclosures exits the enclosure and the other part is entrained by the velocity plume. The numerical computations of differential static pressure show that near the floor the values of differential static pressure are negative and outside the vicinity of the floor they are positive and increase with the height of the enclosure. The static pressure profiles have the same appearance. The comparisons of the static pressure profiles obtained in the Case 23 enclosure with the results of the literature are consistent.

Keywords: Heat source; pressure field; Semi–confined enclosure; velocity fields (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://eu-opensci.org/index.php/ejeng/article/view/63258 Abstract page (text/html)
https://eu-opensci.org/index.php/ejeng/article/download/63258/13267 Full text (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:epw:ejeng0:v:10:y:2025:i:3:id:63258

DOI: 10.24018/ejeng.2025.10.3.3258

Access Statistics for this article

More articles in European Journal of Engineering and Technology Research from European Open Science
Bibliographic data for series maintained by Support ().