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All Journal ASEAN Journal of Community Engagement Makara Journal of Technology
Budiarso Budiarso, Budiarso
Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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DIFFUSING SIGNAGE AS A VISUAL COMMUNICATION IN APPLIED OF PICO HYDRO TECHNOLOGY IN BATU ROTO, BENGKULU PROVINCE, INDONESIA Satria, Hardika; Naldo, Naldo; Krypton, Arius; Adanta, Dendy; Budiarso, Budiarso
ASEAN Journal of Community Engagement Vol. 2 No. 1 (2018)
Publisher : UI Scholars Hub

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Communication plays an important role in spreading idea. This paper describes the important role of visual communication in our community engagement activity that has been done in 2017, particularly in signage and the power to difuse information of Pico Hydro technology within Batu Roto village, Bengkulu Province, Indonesia. The community engagement itself is based on multidiscipline point of view specifically communication and engineering. Pico Hydro is commonly used worldwide to generate electricity in rural area, thus it is very useful for rural electrification. We conducted research to fullfill the needs of our plan in the community engagement and used communication development theory to support the outcome of this program. Communication development theory has focus on disemination of innovation. The method of this study is desk research such as the psychology of colour and typography. The paper argues that the application of Pico Hydro technology would have more impact on the people of Batu Roto village if it is combines with the social science method of communication development through signage. The information that lies in the signage hopefully can spread the idea of practicing pico hydro in many houses in the Batu Roto village so it can solve the problem of lack electricity in the Bengkulu Province.
Limiting Maximum Drag Reduction Asymptote for the Moment Coefficient of an Enclosed Rotating Disk with Fine Spiral Grooves Budiarso, Budiarso; Watanabe, Keizo; Ogata, Satoshi
Makara Journal of Technology Vol. 11, No. 2
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In this study, the limiting maximum drag reduction asymptote for the moment coefficient of an enclosed rotating disk with fine spiral grooves in turbulent flow region were obtained analytically. Analysis which were based on an assumption for a simple parabolic velocity distribution of turbulent pipe flow to represent relative tangential velocity, was carried out using momentum integral equations of the boundary layer. For a certain K- parameter the moment coefficient results agree well with experimental results for maximum drag reduction in an enclosed rotating disk with fine spiral grooves and drag reduction ratio approximately was 15 %. Additionally, the experimental results for drag reduction on a rotating disk can be explained well with the analytical results.
Modification of Flow Structure Over a Van Model By Suction Flow Control to Reduce Aerodynamics Drag Harinaldi, Harinaldi; Budiarso, Budiarso; Warjito, Warjito; Kosasih, Engkos Achmad; Tarakka, Rustan; Simanungkalit, Sabar Pangihutan; Lay Teryanto, I Gusti Made Fredy
Makara Journal of Technology Vol. 16, No. 1
Publisher : UI Scholars Hub

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Automobile aerodynamic studies are typically undertaken to improve safety and increase fuel efficiency as well as to find new innovation in automobile technology to deal with the problem of energy crisis and global warming. Some car companies have the objective to develop control solutions that enable to reduce the aerodynamic drag of vehicle and significant modification progress is still possible by reducing the mass, rolling friction or aerodynamic drag. Some flow control method provides the possibility to modify the flow separation to reduce the development of the swirling structures around the vehicle. In this study, a family van is modeled with a modified form of Ahmed's body by changing the orientation of the flow from its original form (modified/reversed Ahmed body). This model is equipped with a suction on the rear side to comprehensively examine the pressure field modifications that occur. The investigation combines computational and experimental work. Computational approach used a commercial software with standard kepsilon flow turbulence model, and the objectives was to determine the characteristics of the flow field and aerodynamic drag reduction that occurred in the test model. Experimental approach used load cell in order to validate the aerodynamic drag reduction obtained by computational approach. The results show that the application of a suction in the rear part of the van model give the effect of reducing the wake and the vortex formation. Futhermore, aerodynamic drag reduction close to 13.86% for the computational approach and 16.32% for the experimental have been obtained.
Co-Authors Adanta, Dendy Engkos Achmad Kosasih Engkos Kosasih Harinaldi . I Gusti Made Teryanto, I Gusti Made James Julian Keizo Watanabe, Keizo krypton, arius Lay Teryanto, I Gusti Made Fredy Naldo, Naldo Parker Stefan, Parker Revan Difitro, Revan Rustan Tarakka, Rustan Sabar Pangihutan Simanungkalit Sabar Simanungkalit, Sabar Satoshi Ogata, Satoshi Satria, Hardika Warjito Warjito, Warjito