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경사진 원형관에서 표면장력과 중력으로 구동되는 비뉴턴유체(Casson 모델)의 지배방정식 개발 Development of Governing Equation for a Non-Newtonian Fluid(Casson Model) driven by Surface Tension and Gravity Force in an Inclined Circular Tube

모정하
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한국기계기술학회지 (韓國機械技術學會誌)
제21권 제2호 (2019.04)
pp.206-212
한국기계기술학회 (Korean Society of Mechanical Technology)
초록

This paper presents the theoretical analysis for the flow driven by surface tension and gravity force in an inclined circular tube. The previously developing equation for Power-Law model is a simple ordinary differential type. A governing equation is developed for describing the displacement of a non-Newtonian fluid(Casson model) that continuously flows into a circular tube by surface tension, which represents a second-order, nonlinear, non-homogeneous, and ordinary differential form. It was found that the theoretical predictions of the governing equation were in good agreement with the results for considering the Newtonian model.

키워드
Surface tension표면장력Viscous force점성력Gravity force중력Non-newtonian fluid비뉴턴 유체Casson model카슨 모델Yield stress항복응력Governing equation지배방정식
목차
ABSTRACT
 1. 서 론
 2. 이 론
  2.1 Casson 모델
  2.2 체적유량
  2.3 속도분포
  2.4 벽전단율
  2.5 지배방정식
 3. 결과 및 고찰
  3.1 지배방정식의 유용성 검토
  3.2 항복응력의 변화에 따른 변위
  3.3 항복응력의 변화에 따른 벽전단율
 4. 결 론
 References
저자
  • 모정하(Division of Mechanical & Automotive Engineering at Wonkwang university.) | Jeong-Hah Moh Corresponding Author