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All Journal PIKSEL : Penelitian Ilmu Komputer Sistem Embedded and Logic Jurnal Fisika FLUX
Lubis, Nuraina Fika
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Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

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The Simulation of Heat Propagation Rate in Smart Roasting Process Using Finite Difference Method Sari, Rafika; Lubis, Nuraina Fika; Fitriyani, Aida; Mayadi, Mayadi
PIKSEL : Penelitian Ilmu Komputer Sistem Embedded and Logic Vol 8 No 1 (2020): Maret 2020
Publisher : LPPM Universitas Islam 45 Bekasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/piksel.v8i1.2020

Abstract

In the industrial 4.0 era, there have been many developments in daily equipment that have been transformed into more sophisticated tools both in terms of how they are used, the efficiency of their work and the quality of the results obtained due to the digitization process that is easily accessed by many people. Therefore, As the early step, the paper discusses the computational modeling in the automatic cooking methods, namely the smart roaster system. The cooking method in the form of granules by using a roasting process, which generally utilizes heated sand, is interesting to learn since there are two mechanisms of heat propagation from the pan to the food object, namely the mechanism of heat propagation by conduction and radiation, but in this study, the heat propagation due to temporary convection was ignored. The first mechanism is accommodated by Fourier's Law, while the second is by Stefan-Boltzmann's Law. For simplification, the system is discussed in one dimension with the same grain size, but the object can have a different size. The composition of the pan walls, grains of sand, empty space, and food objects can be randomized so that various configurations can be created. Discussed how the process of heat propagation can occur in the roasting process and also radiation to the surrounding space on the top of the sand surface. The numerical analysis method is used with the finite difference method and the Matlab programming language for simulation.
Acoustic Absorption Coefficient of Oil Palm Midrib Composite Defrianto, Defrianto; Ahlunnazah, Muhammad; Saktioto, Saktioto; Lubis, Nuraina Fika
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 22, No 1 (2025): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v22i1.20339

Abstract

Composite from oil palm midrib waste is one of the natural fiber materials that can reduce noise. Its material sample composite with gypsum was placed inside an impedance tube, which fitted with the mass of palm midrib mill, i.e., 0.1 kg, 0.15 kg, and 0.2 kg. Next, sound absorption coefficients were measured based on the two farthest ranges of the sound-receiving microphone, i.e., range A, which was 45 cm from the sample, and range B, which was 55 cm from the sample. Sound source frequencies were used, i.e., 125 Hz, 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz. This research found that the link between sound absorption coefficients and the mass differences of each sample was not significantly affected. The highest sound absorption coefficient is 0.979 in distance A for oil palm midrib sample mass of 0.15 kg, far bigger than gypsums on the same frequency (125 Hz), which is 0.29. In conclusion, sound absorption on oil palm midrib was better because it has higher sound absorption coefficients than gypsum and a minimum sound absorption coefficient standard of 0.15. In the future, oil palm midribs might be widely used as sound-absorbing materials based on their advantages.
Co-Authors Ahlunnazah, Muhammad Aida Fitriyani, Aida Defrianto Defrianto Mayadi, Mayadi Rafika Sari Saktioto Saktioto