Proceedings of the 2nd International Conference of Science and Technology for the Internet of Things, ICSTI 2019, September 3rd 2019, Yogyakarta, Indonesia

Research Article

# Efficiency and Effectiveness of a Rotation-Shaped Fin Having the Cross-Section Area Dependent on the One-Dimensional Position

• ```@INPROCEEDINGS{10.4108/eai.20-9-2019.2292097,
author={Petrus Kanisius Purwadi and Yunus  Angga and Sudi  Mungkasi},
title={Efficiency and Effectiveness of a Rotation-Shaped Fin Having the Cross-Section Area Dependent on the One-Dimensional Position },
proceedings={Proceedings of the 2nd International Conference of Science and Technology for the Internet of Things, ICSTI 2019, September 3rd 2019, Yogyakarta, Indonesia},
publisher={EAI},
proceedings_a={ICSTI},
year={2020},
month={3},
doi={10.4108/eai.20-9-2019.2292097}
}
```
Yunus Angga
Sudi Mungkasi
Year: 2020
Efficiency and Effectiveness of a Rotation-Shaped Fin Having the Cross-Section Area Dependent on the One-Dimensional Position
ICSTI
EAI
DOI: 10.4108/eai.20-9-2019.2292097
Petrus Kanisius Purwadi1,*, Yunus Angga1, Sudi Mungkasi2
• 1: Department of Mechanical Engineering, Universitas Sanata Dharma, Yogyakarta, Indonesia
• 2: Department of Mathematics, Universitas Sanata Dharma, Yogyakarta, Indonesia
*Contact email: pur@usd.ac.id

## Abstract

This article reports research results on the efficiency and effectiveness of a rotation-shaped fin. The cross section area of the fin is dependent on the one-dimensional position. The computation is based on the conservation of energy. Using a finite difference method, we compute the temperature of the fin at every time step. We focus our investigation in unsteady state problems. We obtain that when the state is unsteady, the efficiency and effectiveness of the fin are affected by the thermal diffusivity of the material. When the state is steady, the efficiency and effectiveness of the fin is affected by the thermal conductivity of the material. The velocity of the fluid acrosses the fin influences the efficiency and effectiveness of the fin, that is, the greater the speed of fluid flowing across the fins, the lower the efficiency and effectiveness of the fin.