Volume 19 - Issue 1
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IJERD : Volume 19 - Issue 1
(January - February - 2023) |
Wibowo, Robertoes Koekoeh Koentjoro, Mahros Darsin, Hari Arbiantara Basuki, Bambang Sri Kaloko, Joko Triono, Abdul Rais |
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The Design of Appropriate Technology of an Egg Tray Machine | ||||||||
Managing fibrous waste such as paper into useful packaging materials can help reduce large amounts of paper waste. Laboratory-scale appropriate technology machines were developed to print paper pulp into egg trays by means of suction. The pulp-making process includes collecting waste paper, sorting according to paper grade, pulping, egg tray making and the final process is sun-drying. The machine consists of a mould, a slurry container and an electric mechanism to operate the machine. The machine works on the principle of suction with a pulp slurry consistency of about 5%.
egg tray, machine, appropriate technology
[1]. Berg, P.; and Lingqvist, O., 2018. Pulp, Paper and Packaging in the NEXT decade: Transformational Change. McKinsey & Company, 2017. Available online: https://www.mckinsey.com/industries/paper-and-forestproducts/our-insights/pulp-paper-and-packaging-in-the-next-decade-transformational-change (accessed on 12 November 2018).
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Salma Akter, Abu Syed Mohammed Faisal, Mohammad Alamgir Kabir, Mohammad Anisur Rahman, Md. Ahsan Habib, Md. Azahar Hossain |
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Padma River Bank Erosion in Naria, Shariatpur District, Bangladesh: Geomorphological, Geological, and Geotechnical Aspects | ||||||||
The Naria Upazila of the Shariatpur district is situated on the right bank of the mighty Padma River, where extensive riverbank erosion has been occurring over the past several years. The purpose of the study is to decipher the geomorphological, geological, and engineering geological causes of bank erosion in the area. Conventional fieldwork was carried out in the area and systematic sample collection was done. Standard laboratory processes were followed to analyze the samples. The aerial photographs and Google images study indicate that the Tippera alluvial sediments of the Mid-Holocene age are less eroded than the active bar and floodplain deposits of recent age.........
Bank erosion, Geotechnical, N-value, Padma, Tippera.
[1]. Abidin, R. Z., Sulaiman, M. S., & Yusoff, N. 2017. Erosion risk assessment- A case study of the Langat River bank in Malaysia, International Soil and Water Conservation Research, 5(1), pp 26-35. https://doi.org/10.1016/j.iswcr.2017.01.002. [2]. Alam, M., Alam, M. M., Curray, J. R., Chowdhury, M. L. R., & Gani, M. R. 2003. An overview of the sedimentary geology of the Bengal Basin in relation to the regional tectonic framework and basin-fill history. Sedimentary Geology, 155(3-4), 179-208.
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Syed Muhammad Arafat, Muhammad Waqas Aslam, Sajawal Gul Niazi , Ghulam Moeen Uddin, Muhammad Umar Malkana, Abdul Rehman, Muhammad Zeeshan Nawaz, SyedWasim Hassan Zubair, Abdul Raheem, Raees Ahmad, Muhammad Athar Mahmood , Muhammad Arif , Muhammad Talha Saeed, Muhammad Talha Nawazish , Umer Farooq , Abe Zeid |
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Computational Fluid Dynamic Analysis of Ahmed Body in Martian Environment | ||||||||
This research work presents the computational aerodynamic study of Ahmed body situated in Martian
environment in comparison with Earth's environment. The hybrid RANS-LES model with the dynamic
Smagorinsky-Lilly method is used to capture flow characteristics of the wake region of Ahmed body. A
comprehensive mesh independence study is conducted to obtain the results, which are approximately unaffected
by mesh resolution. The impact of three critical variables i.e., slant angle, stream velocity and temperature is
analyzed on flow behavior. It is observed that the difference in Martian and Earth environment have
considerable effect on coefficient of drag experienced by the Ahmed body. It is also found that the slant angle
plays a vital role in aerodynamic performance of Ahmed body. A noticeable difference in coefficient of drag is
observed by changing the temperature for........
Ahmed Body, CFD in Martian environment, vehicle aerodynamics, Fluid flow analysis of Ahmed
body, Mars
[1]. Davila, A.F. and D.J.A. Schulze-Makuch, The last possible outposts for life on Mars. 2016. 16(2): p. 159-168.
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