Influence of assisting gas type on the nusselt number and the skin friction on slots in relation to laser cutting

Omar A. Melhem; Bekir S. Yilbas; Shahzada Z. Shuja; Ahmet Z. Sahin

doi:10.1080/01457632.2012.746549

Influence of assisting gas type on the nusselt number and the skin friction on slots in relation to laser cutting

Omar A. Melhem, Bekir S. Yilbas^*, Shahzada Z. Shuja, Ahmet Z. Sahin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The assisting gas jet emerging from a conical nozzle and impinging onto a three-dimensional slot resembling laser cutting is examined. The flow and temperature fields around the slot are predicted numerically, incorporating the control volume approach. The Nusselt number and the skin friction variation due to different assisting gases, including helium, nitrogen, and air, are predicted at slot walls. The model study includes the three-dimensional modeling of turbulence flow field around the slot. It is found that the assisting gas type has significant effects on the Nusselt number and the skin friction at the slot surface: the Nusselt number reduces significantly while the skin friction increases considerably for helium assisting gas.

Original language	English
Pages (from-to)	852-862
Number of pages	11
Journal	Heat Transfer Engineering
Volume	34
Issue number	10
DOIs	https://doi.org/10.1080/01457632.2012.746549
State	Published - 9 Aug 2013

Bibliographical note

Funding Information:
The authors acknowledge the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1080/01457632.2012.746549

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title = "Influence of assisting gas type on the nusselt number and the skin friction on slots in relation to laser cutting",

abstract = "The assisting gas jet emerging from a conical nozzle and impinging onto a three-dimensional slot resembling laser cutting is examined. The flow and temperature fields around the slot are predicted numerically, incorporating the control volume approach. The Nusselt number and the skin friction variation due to different assisting gases, including helium, nitrogen, and air, are predicted at slot walls. The model study includes the three-dimensional modeling of turbulence flow field around the slot. It is found that the assisting gas type has significant effects on the Nusselt number and the skin friction at the slot surface: the Nusselt number reduces significantly while the skin friction increases considerably for helium assisting gas.",

author = "Melhem, \{Omar A.\} and Yilbas, \{Bekir S.\} and Shuja, \{Shahzada Z.\} and Sahin, \{Ahmet Z.\}",

note = "Funding Information: The authors acknowledge the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.",

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doi = "10.1080/01457632.2012.746549",

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T1 - Influence of assisting gas type on the nusselt number and the skin friction on slots in relation to laser cutting

AU - Melhem, Omar A.

AU - Yilbas, Bekir S.

AU - Shuja, Shahzada Z.

AU - Sahin, Ahmet Z.

N1 - Funding Information: The authors acknowledge the support of King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

PY - 2013/8/9

Y1 - 2013/8/9

N2 - The assisting gas jet emerging from a conical nozzle and impinging onto a three-dimensional slot resembling laser cutting is examined. The flow and temperature fields around the slot are predicted numerically, incorporating the control volume approach. The Nusselt number and the skin friction variation due to different assisting gases, including helium, nitrogen, and air, are predicted at slot walls. The model study includes the three-dimensional modeling of turbulence flow field around the slot. It is found that the assisting gas type has significant effects on the Nusselt number and the skin friction at the slot surface: the Nusselt number reduces significantly while the skin friction increases considerably for helium assisting gas.

AB - The assisting gas jet emerging from a conical nozzle and impinging onto a three-dimensional slot resembling laser cutting is examined. The flow and temperature fields around the slot are predicted numerically, incorporating the control volume approach. The Nusselt number and the skin friction variation due to different assisting gases, including helium, nitrogen, and air, are predicted at slot walls. The model study includes the three-dimensional modeling of turbulence flow field around the slot. It is found that the assisting gas type has significant effects on the Nusselt number and the skin friction at the slot surface: the Nusselt number reduces significantly while the skin friction increases considerably for helium assisting gas.

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Influence of assisting gas type on the nusselt number and the skin friction on slots in relation to laser cutting

Abstract

Bibliographical note

ASJC Scopus subject areas

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