Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Flow of Drilling Fluids in Slim hole Annuli

굴착유체의 Slim Hole 환형관 내 유동특성에 관한 연구

  • Seo Byung-Taek (Graduated School of Mechanical Engineering, Sungkyunkwan University) ;
  • Woo Nam-Sub (Graduated School of Mechanical Engineering, Sungkyunkwan University) ;
  • Hwang Young-Kyu (School of Mechanical Engineering, Sungkyunkwan University)
  • 서병택 (성균관대학교 기계공학과 대학원) ;
  • 우남섭 (성균관대학교 기계공학과 대학원) ;
  • 황영규 (성균관대학교 기계공학부)
  • Published : 2006.04.01
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Abstract

The paper concerns an experimental study of fully developed laminar flow of a Newtonian and non-Newtonian liquid in concentric annuli with combined bulk axial flow and inner cylinder rotation. Pressure losses and skin friction coefficients have been measured for Newtonian fluid, water and non-Newtonian fluids, 0.2% aqueous of sodium carboxymethyl cellulose (CMC) and 5% bentonite solutions, when the inner cylinder rotates at the speed of $0{\sim}500$ rpm. The influences of rotation, radius ratio and working fluid on the annular flow field are investigated. And the new correlations among the skin friction coefficient, the Reynolds number and the Rossby number are presented with reasonable limits of accuracy in laminar flow regime.

Keywords

References

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