Earticle

초록

영어

In this paper, the heat transfer performance of nanofluids is predicted by numerical analysis methods. The nanoparticles used in this study is SiO2, with concentrations of 1, 2, 3vol.%, and the base fluid is water. Reynolds number of nanofluids ranges from 10,000 to 50,000. A numerical study on the heat transfer characteristics of nanofluid was conducted using a single-phase model. The temperature of the fluid entering from the inlet of the tube is 293.15K. A constant heat flux of 31,650W/m2 was applied at the wall, and the thickness of the wall was ignored. Heat transfer coefficients, thermal conductivity and Nusselt number were selected as indicators for comparing heat transfer performance of nanofluids. As the nanofluid concentration increases, the temperature and velocity distribution by the cross section of the coil tube and straight tube increased. As the Reynolds number increases, temperature difference between inner direction and outer direction reduced in coil tube. For straight tube, the temperature difference between the wall and the center of the tube also decreased.

목차

ABSTRACT
1. 서론
2. 수치해석 방법
2.1 열적 물성 계산
2.2 수치해석 방법
2.3 Grid Independence Test
2.4 데이터 처리
3. 수치해석 결과
3.1 나노유체의 농도에 따른 영향
3.2 나노유체의 Re 수에 따른 영향
3.3 코일관과 직관의 열전달 성능 비교
4. 결론
References

키워드

저자

• 전유선 [ Yuseon Jeon | Jeonbuk National University, Dept. of Mechanical Eng ]
• 남현택 [ Hyeon-Taek Nam | Jeonbuk National University, Dept. of Mechanical Eng ]
• 김종현 [ Jong-Hyun Kim | Korea Lift College ]
• 이승로 [ Seungro Lee | Jeonbuk National University, Dept. of Mechanical Eng ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620