Measurement and modeling of confined jet discharged tangentially on a concave semicylindrical hot surface

Mohammad O. Hamdan, Emad Elnajjar, Yousef Haik

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The paper investigates experimentally and numerically the heat transfer augmentation from a semicircular heated surface due to confined slot-jet impingement. For different Reynolds numbers, the average and local Nusselt numbers are calculated by reporting the heater thermal image obtained by an infrared camera, the inlet and outlet flow temperature via thermocouples, the flow rate via rotameter, and the pressure drop across the inlet and outlet flow via pressure transducers. The single enclosed jet flow is used to create a single cyclone inside the internal semicircular channel to promote the heat transfer at different jet Reynolds numbers (Rejet 1000-5000). Three turbulence models, namely, the standard k-ε , k-ω; and the Reynolds stress model (RSM) have been investigated in the present paper by comparing Nusselt number and normalized pressure drop distribution against the experimental data, helping ascertain on the relative merits of the adopted models. The computational fluid dynamics results show that the RSM turbulent model reasonably forecast the experimental data.

Original languageEnglish
Article number122203
JournalJournal of Heat Transfer
Volume133
Issue number12
DOIs
Publication statusPublished - 2011
Externally publishedYes

Fingerprint

hot surfaces
outlet flow
inlet flow
Reynolds stress
Nusselt number
pressure drop
Pressure drop
Reynolds number
heat transfer
Heat transfer
jet impingement
cyclones
jet flow
Pressure transducers
turbulence models
pressure sensors
thermocouples
Thermocouples
computational fluid dynamics
Turbulence models

Keywords

  • internal channel cooling
  • jet impingement
  • side-jet entry
  • swirl flow
  • thermography

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Measurement and modeling of confined jet discharged tangentially on a concave semicylindrical hot surface. / Hamdan, Mohammad O.; Elnajjar, Emad; Haik, Yousef.

In: Journal of Heat Transfer, Vol. 133, No. 12, 122203, 2011.

Research output: Contribution to journalArticle

@article{878c7aa101c64df9bd1574273de1a087,
title = "Measurement and modeling of confined jet discharged tangentially on a concave semicylindrical hot surface",
abstract = "The paper investigates experimentally and numerically the heat transfer augmentation from a semicircular heated surface due to confined slot-jet impingement. For different Reynolds numbers, the average and local Nusselt numbers are calculated by reporting the heater thermal image obtained by an infrared camera, the inlet and outlet flow temperature via thermocouples, the flow rate via rotameter, and the pressure drop across the inlet and outlet flow via pressure transducers. The single enclosed jet flow is used to create a single cyclone inside the internal semicircular channel to promote the heat transfer at different jet Reynolds numbers (Rejet 1000-5000). Three turbulence models, namely, the standard k-ε , k-ω; and the Reynolds stress model (RSM) have been investigated in the present paper by comparing Nusselt number and normalized pressure drop distribution against the experimental data, helping ascertain on the relative merits of the adopted models. The computational fluid dynamics results show that the RSM turbulent model reasonably forecast the experimental data.",
keywords = "internal channel cooling, jet impingement, side-jet entry, swirl flow, thermography",
author = "Hamdan, {Mohammad O.} and Emad Elnajjar and Yousef Haik",
year = "2011",
doi = "10.1115/1.4004529",
language = "English",
volume = "133",
journal = "Journal of Heat Transfer",
issn = "0022-1481",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "12",

}

TY - JOUR

T1 - Measurement and modeling of confined jet discharged tangentially on a concave semicylindrical hot surface

AU - Hamdan, Mohammad O.

AU - Elnajjar, Emad

AU - Haik, Yousef

PY - 2011

Y1 - 2011

N2 - The paper investigates experimentally and numerically the heat transfer augmentation from a semicircular heated surface due to confined slot-jet impingement. For different Reynolds numbers, the average and local Nusselt numbers are calculated by reporting the heater thermal image obtained by an infrared camera, the inlet and outlet flow temperature via thermocouples, the flow rate via rotameter, and the pressure drop across the inlet and outlet flow via pressure transducers. The single enclosed jet flow is used to create a single cyclone inside the internal semicircular channel to promote the heat transfer at different jet Reynolds numbers (Rejet 1000-5000). Three turbulence models, namely, the standard k-ε , k-ω; and the Reynolds stress model (RSM) have been investigated in the present paper by comparing Nusselt number and normalized pressure drop distribution against the experimental data, helping ascertain on the relative merits of the adopted models. The computational fluid dynamics results show that the RSM turbulent model reasonably forecast the experimental data.

AB - The paper investigates experimentally and numerically the heat transfer augmentation from a semicircular heated surface due to confined slot-jet impingement. For different Reynolds numbers, the average and local Nusselt numbers are calculated by reporting the heater thermal image obtained by an infrared camera, the inlet and outlet flow temperature via thermocouples, the flow rate via rotameter, and the pressure drop across the inlet and outlet flow via pressure transducers. The single enclosed jet flow is used to create a single cyclone inside the internal semicircular channel to promote the heat transfer at different jet Reynolds numbers (Rejet 1000-5000). Three turbulence models, namely, the standard k-ε , k-ω; and the Reynolds stress model (RSM) have been investigated in the present paper by comparing Nusselt number and normalized pressure drop distribution against the experimental data, helping ascertain on the relative merits of the adopted models. The computational fluid dynamics results show that the RSM turbulent model reasonably forecast the experimental data.

KW - internal channel cooling

KW - jet impingement

KW - side-jet entry

KW - swirl flow

KW - thermography

UR - http://www.scopus.com/inward/record.url?scp=80054015568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80054015568&partnerID=8YFLogxK

U2 - 10.1115/1.4004529

DO - 10.1115/1.4004529

M3 - Article

AN - SCOPUS:80054015568

VL - 133

JO - Journal of Heat Transfer

JF - Journal of Heat Transfer

SN - 0022-1481

IS - 12

M1 - 122203

ER -