Details
| Original language | English |
|---|---|
| Article number | 35 |
| Journal | Frontiers in Heat and Mass Transfer |
| Volume | 19 |
| Issue number | 35 |
| Publication status | Published - 2022 |
Abstract
The objective of the present research is the prediction of large arrays of impingement jets using a computational model. The heat transfer and the force coefficient from single and multiple jet rows (1, 2, 4, 8, and infinity rows) for two different nozzle shapes as either orifice or straight pipe on a fixed flat surface were numerically investigated for drying applications to understand the physical mechanisms which affect the uniformity of the local heat transfer and pressure force coefficient as well as average heat transfer coefficient. The pipe has always a higher averaged Nu and pressure force coefficient compared to the orifice nozzle. Increasing the nozzle to surface distance and decreasing the jet impingement angle reduces the heat transfer and pressure force coefficient. The local Nu number curves for multiple jet rows exhibited many different shapes because of different interference intensities between adjacent jets and also the magnitude of cross-flow. The impact of multiple jet rows on averaged Nu number and jet force coefficient was negligible compared to the single jet row.
Keywords
- CFD, Heat Transfer, Jet Impingement, Jet Rows, Nozzle Shape, Pressure Force
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- General Engineering
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Frontiers in Heat and Mass Transfer, Vol. 19, No. 35, 35, 2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Numerical Simulation of large arrays of impinging jets on a flat surface
AU - Chitsazan, Ali
AU - Klepp, Georg
AU - Glasmacher, Birgit
PY - 2022
Y1 - 2022
N2 - The objective of the present research is the prediction of large arrays of impingement jets using a computational model. The heat transfer and the force coefficient from single and multiple jet rows (1, 2, 4, 8, and infinity rows) for two different nozzle shapes as either orifice or straight pipe on a fixed flat surface were numerically investigated for drying applications to understand the physical mechanisms which affect the uniformity of the local heat transfer and pressure force coefficient as well as average heat transfer coefficient. The pipe has always a higher averaged Nu and pressure force coefficient compared to the orifice nozzle. Increasing the nozzle to surface distance and decreasing the jet impingement angle reduces the heat transfer and pressure force coefficient. The local Nu number curves for multiple jet rows exhibited many different shapes because of different interference intensities between adjacent jets and also the magnitude of cross-flow. The impact of multiple jet rows on averaged Nu number and jet force coefficient was negligible compared to the single jet row.
AB - The objective of the present research is the prediction of large arrays of impingement jets using a computational model. The heat transfer and the force coefficient from single and multiple jet rows (1, 2, 4, 8, and infinity rows) for two different nozzle shapes as either orifice or straight pipe on a fixed flat surface were numerically investigated for drying applications to understand the physical mechanisms which affect the uniformity of the local heat transfer and pressure force coefficient as well as average heat transfer coefficient. The pipe has always a higher averaged Nu and pressure force coefficient compared to the orifice nozzle. Increasing the nozzle to surface distance and decreasing the jet impingement angle reduces the heat transfer and pressure force coefficient. The local Nu number curves for multiple jet rows exhibited many different shapes because of different interference intensities between adjacent jets and also the magnitude of cross-flow. The impact of multiple jet rows on averaged Nu number and jet force coefficient was negligible compared to the single jet row.
KW - CFD
KW - Heat Transfer
KW - Jet Impingement
KW - Jet Rows
KW - Nozzle Shape
KW - Pressure Force
UR - http://www.scopus.com/inward/record.url?scp=85144593012&partnerID=8YFLogxK
U2 - 10.5098/hmt.19.35
DO - 10.5098/hmt.19.35
M3 - Article
AN - SCOPUS:85144593012
VL - 19
JO - Frontiers in Heat and Mass Transfer
JF - Frontiers in Heat and Mass Transfer
IS - 35
M1 - 35
ER -