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All Journal IPTEK The Journal for Technology and Science Bulletin of Islamic Research
Fahmi Fahreza
Unknown Affiliation
Religion Humanities Computer Science & IT Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice

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Plane Wall Effect of Flow around Two Circular Cylinders in Tandem Arrangement Triyogi Yuwono; Wawan Aries Widodo; Heru Mirmanto; Fahmi Fahreza
IPTEK The Journal for Technology and Science Vol 22, No 1 (2011)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v22i1.56

Abstract

The flow characteristic around two circular cylinders in tandem arrangement located near a plane wall were investigated experimentally in a uniform flow at a Reynolds Number of 5.3 x 104. The center to center spacing between the two cylinders relative to the cylinder diameter was constantly maintained at P/D = 1.5. The pressure distributions along the surface of the cylinder and the plane wall were measured by varying the gap-to-diameter of cylinder ratio (G/D) in the range of 0 < G/D < 0.467. Surface oil-film techniques were used to investigate the flow patterns on the cylinder. The result showed that for upstream cylinder, in the gap-to-diameter ratio G/D < /D, there is no stagnation point at front side of the upstream cylinder; it is gradually raised as the gap increase. For the downstream cylinder, a peak on the lower side of the front side of the cylinder is apparent in each of the pressure distributions. This peak represents the reattachment of shear layer that separates from lower side of the upstream cylinder. The reattachment point tends to move forward close to the angular position of  = 0o as the gap ratio increase. The shear layer bifurcates into two shear layers. One shear layer continues in the downstream direction, and the other shear layer flows in the upstream direction.
Thoroughly Exploring Secularism in an Islamic Perspective: History, Dynamics, and Interpretation of the Qur'an Cahyani M Djamil, Eka; Galih Rahayu, Eka; Fahreza, Fahmi
Bulletin of Islamic Research Vol. 2 No. 1 (2024)
Publisher : Educational Foundation for Qur'anic Exegesis and Hadith Studies (Yayasan Pendidikan Tafsir Hadis)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69526/bir.v2i1.30

Abstract

Secularism, a concept that emerged in the West and spread throughout the world, including Indonesia, has become a subject of debate in relation to religion, especially Islam. This research aims to explore the definition of secularism, its development in various fields, the changes that arise as a result, the interpretation of Qur'anic verses related to secularism, and scholars' perspectives on this matter. Through a qualitative method, this research utilises secondary data sources, such as journal articles and books, to provide a deeper understanding of this topic. The results show that secularism is considered as the separation of human affairs from God's affairs in all aspects of life, including education. Yusuf Qardhawi expressed his concern over the influence of secularism and atheism in the Islamic world, fuelled by colonialism and modernity. In the context of Qur'anic verses, this study found references to secularism in Surah Al-Isra' and Surah Hud. In this context, the contrast between worldly and afterlife orientations, as well as warnings against mere worldly pleasures, take centre stage. As such, this study provides a deep insight into how Islam understands and interprets secularism.
Co-Authors Cahyani M Djamil, Eka Galih Rahayu, Eka Heru Mirmanto Triyogi Yuwono Wawan Aries Widodo