In this study, the peak surface velocity driven by thermocapillary force in melting or welding pool irradiated by a distributed low-power-density beam is determined from a scale analysis. In view of different distances of diffusion between momentum and energy, the effects of Prandtl number on surface velocity are of interest. A low-power-density-beam heating implies no deep and narrow cavity (or keyhole) taking place in the pool. The results find that the peak surface velocity is proportional to the first power and 2/3 power of the surface tension coefficient or Marangoni number for high and low Prandtl number, respectively. The free surface velocity is determined by Prandtl and Marangoni numbers for given dimensionless beam power and Peclet numbers. The predictions agree with numerical computations.
Skip Nav Destination
ASME/JSME 2011 8th Thermal Engineering Joint Conference
March 13–17, 2011
Honolulu, Hawaii, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-3892-1
PROCEEDINGS PAPER
Scaling Thermocapillary Surface Velocity in Weld Pool
P. S. Wei,
P. S. Wei
National Sun Yat-Sen University, Kaohsiung, Taiwan
Search for other works by this author on:
C. L. Lin,
C. L. Lin
National Sun Yat-Sen University, Kaohsiung, Taiwan
Search for other works by this author on:
C. N. Ting
C. N. Ting
National Sun Yat-Sen University, Kaohsiung, Taiwan
Search for other works by this author on:
P. S. Wei
National Sun Yat-Sen University, Kaohsiung, Taiwan
C. L. Lin
National Sun Yat-Sen University, Kaohsiung, Taiwan
C. N. Ting
National Sun Yat-Sen University, Kaohsiung, Taiwan
Paper No:
AJTEC2011-44068, T10141; 7 pages
Published Online:
March 1, 2011
Citation
Wei, PS, Lin, CL, & Ting, CN. "Scaling Thermocapillary Surface Velocity in Weld Pool." Proceedings of the ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASME/JSME 2011 8th Thermal Engineering Joint Conference. Honolulu, Hawaii, USA. March 13–17, 2011. T10141. ASME. https://doi.org/10.1115/AJTEC2011-44068
Download citation file:
9
Views
Related Proceedings Papers
Related Articles
Scaling Weld or Melt Pool Shape Affected by Thermocapillary Convection With High Prandtl Numbers
J. Heat Transfer (April,2012)
Transient Thermocapillary Convection in a Molten or Weld Pool
J. Manuf. Sci. Eng (February,2012)
Filling Process in an Open Tank
J. Fluids Eng (November,2003)
Related Chapters
Dynamic Behavior of Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach
Aerodynamic Performance Analysis
Axial-Flow Compressors
Pin Floating on Surface of a Liquid
Case Studies in Fluid Mechanics with Sensitivities to Governing Variables