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Usman Malik
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Komunikasi Fisika Indonesia
Published by Universitas Riau
ISSN : 14122960     EISSN : 2579521X     DOI : 10.31258/jkfi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
KFI mempublikasikan artikel hasil penelitian dan review pada bidang fisika, namun tidak terbatas, yang meliputi fisika murni, geofisika, plasma, optik dan fotonik, instrumentasi, dan elektronika, dan fisika terapan (aplikasi fisika).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 390 Documents
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SIMULASI 3 DIMENSI DISTRIBUSI PANAS PLAT KNALPOT MOBIL UNTUK ELEMEN TERMOELEKTRIK Adli, Wildan; Tambunan, Walfred; Umar, Lazuardi
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

This study simulates the distribution of heat in the conductor plate micro energy generation based module Thermoelectric Generator (TEG) type 40-40-10 / 100 to optimize the absorption of heat from the vehicle exhaust waste heat. The module has a maximum operating temperature of 423K. The modeling is done using MATLAB with a modified diffusion equation by application of 900K of temperature as boundary condition on the surface of the base plate which is in contact with the heat source. The plate with aluminum material modeled in varies form of solid, hollow, hollow gitter, hollow heatsink, with dimensions of 110mm long, 60mm wide, 30mm thick base and 30mm thick bulge. The best temperature drop obtained for ΔT = 178,67K (19.85%) produced by the shape of a hollow heatsink plate. The resulting temperature of this model is then lowered back with varying types of material such as aluminum, copper, iron, and stainless steel, as well as by varying the number of TEG array that is 1 to 4-arrays, each array consisting of two modules. Drop in temperature that comes closest to the maximum TEG operating temperature is a drop in temperature that generates the final temperature of 402K, which comes from hollow-with-heatsink stainless steel plate with 50mm of thick and 4-arrays formation.
IDENTIFIKASI KUALITAS AIR BERDASARKAN SIFAT FISIK AIR SUNGAI SIAK PEKANBARU Syech, Riad; Emrinaldi, Tengku; Simbolon, Lundu F
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

A study concerning the determination of the quality of river water and well water around the river Siak using the experimental method has been investigated. This research was conducted by measuring the electrical properties of water at a temperature of 20 ̊C. The type of water used were water streams, water dug wells and water wells drilled in obtaining seven points. Measurement of the electrical properties of water was done by using multitester associated with power suppy, the plate of Copper (Cu) and Zinc (Zn) as a conductor, and the glass beaker as a container for the sample. The measurement will show voltage and current values. Based on voltage and current values,theycan calculate the value of the electrical properties of each sample. Results of river water has a resistance value of 2255.46 Ω, resistivity of 213.14 Ωm, conductivity of 0.00530(Ωm)-1, and power of 3.81 x 10-5 W. The electrical properties of best water wells dug well is six with a resistance value of 3136.46 Ω, resistivity 296.39 Ωm, conductivity of 0.00345 (Ωm)-1, and power of 7.85 x 10-5 W. Based on the results, the value of the electrical properties of the best water is the average electrical properties of water well three (drilled wells) with a resistance value of 3538.61 Ω, the electrical resistivity value of 334.39 Ωm, the electrical conductivity value of 0.00341 (Ωm)-1, and electric power of 4,76x10-5W. The water is suitable for consumption having a resistivity of 3x103 Ω, and the electrical conductivity of (300 to 500) x10-6 (Ωm)-1. Based on the standard resistivity and electrical conductivity, the river and well water samples are unfit for human consumption because the values are still far from the exposure limits.
PENGOLAHAN ISYARAT METODE DIFERENSIAL UNTUK LINIERISASI SENSOR KOIL DATAR Pertiwi, Kisna; Malik, Usman; Umar, Lazuardi
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

Flat coil sensor works by evaluating changes the mutual inductance of the measuring object immersed in a magnetic field of coil. The spiral coil detects without a physical contact with object made on FR4 Printed Circuit Board (PCB). LC-oscillators are used to evaluate change the inductances of two identical sensors in a differential structure with a measured object of copper beryllium (CuBe) moving parallel between the sensors. Flat coil evaluation sensor using LC oscillator produces the eigen frequency of 1MHz up to 2MHz. The linearization of flat coils are carry out using output differential between two oscillator and shown a linear output.
PERUBAHAN KUAT MEDAN MAGNET SEBAGAI FUNGSI JUMLAH LILITAN PADA KUMPARAN HELMHOLTZ Ardiyani, Ginisa
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

Telah dilakukan penelitian tentang rancang bangun dan analisis kumparan Helmholtz yang dibuat dengan diameter 13 cm dan jumlah lilitan yang bervariasi yaitu dari : 50, 100, 150, 200 dan 250 lilitan. Medan magnetik yang ditimbulkan oleh kumparan ini diukur menggunakan probe magnetik pasco PS-2162 sebagai fungsi arus, jarak dan jumlah lilitan. Nilai maksimum medan magnetik yang dihasilkan pada pusat kumparan Helmholtz standar dengan arus sebesar 2 A adalah sebesar 7.156 x 10-5 T sedangkan untuk kumparan Helmholtz yang dibuat adalah 5.907 x 10-5T. Kenaikan jumlah lilitan dan kuat arus mengakibatkan medan magnetik juga semakin besar, untuk kumparan dengan jumlah lilitan 50 dan 250 yang dialiri arus sebesar 1.0 A menghasilkan medan magnetik masing-masing sebesar 5.241 x 10-5T dan 6.208 x 10-5T. Pertambahan ini sesuai dengan yang diharapkan dimana medan magnetik nilainya berbanding lurus dengan arus (I) dan jumlah lilitan (N). Nilai medan magnetik menurun ketika jarak semakin jauh dari pusat kumparan dalam arah horizontal dan vertikal.
POLA ALIRAN AIR BAWAH TANAH DI PERUMNAS GRIYA BINA WIDYA UNRI MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI ELEKTRODA SCHLUMBERGER Edisar, Muhammad; Damayana, Listia
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

The research about groundwater flow pattern in Perumnas Griya Bina Widya UNRI Tampan subdistrict of Pekanbaru have been done. Groundwater flow pattern mode from one dimension geoelectric data of Schlumberger electrode configuration. Based on formation of lithology resulted from geoelectric data, resulted four formation of lithology from block A to block G of the Perumnas. From the mapping resulted groundwater flow pattern on the first formation layer groundwater flow from northeast to south the to the southwest with 10 – 39.1 meters of thickness of layers. On the second formation groundwater flow from the northeast to north the to the south with 8 – 52.8 meters of thickness of layers. The groundwater flow thrith layers from the northeast to the southeast thickness in this layers 2.5 – 75.8 meters. Forwhile groundwater flow on the fourth layers from the north to the southeast by the thickness from 3.5 – 79.1 meters.
PENENTUAN LAJU PENURUNAN KADAR AIR OPAK SINGKONG DENGAN MENGGUNAKAN RUANG PENGERING BERENERGI BIOMASSA LIMBAH PELEPAH KELAPA SAWIT Malik, Usman; Sihotang, Weldo
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

The research was conducted to determine the declining rate water content of cassava using biomass energy from palm fronds. Drying is done by using a drying chamber with a length of 130 cm, width 90 cm and high 120 cm. The drying chamber is formed in such a manner that is equipped with a chimney, two-level drying rack and 2 drums as heat sources. Drying heat sources derived burning biomass from palm fronds in the drum. The room walls are made of plywood with thickness of 8 mm and coated zinc plate with a thickness of 1 mm which is painted black. Samples were dried cassava is opaque and produced in Rejosari Village, District Tenayan Raya, Pekanbaru. First mass each opaque cassava in the rack 1 at 44.13 grams, 41.99 grams, and 46.27, while in the rack 2 of 47.66 grams, 45.02 grams and 45.98 grams. Drying is carried out for 100 minutes with 10 minute intervals where the room temperature is set about 50 ° C to 65 ° C. The decline in the water content on average on both a rack every 10 minutes for observation 100 minutes are 15.30%, 10.62%, 8.84%, 7.17%, 6.40%, 5.78%, 4.71%, 3.74%, 2.75%, 2.52%.
SIMULASI FIBER COUPLER KOMBINASI SERAT MODA TUNGGAL DAN SERAT KISI BRAGG UNTUK KOMPONEN SENSOR OPTIK Meri, Ros
Komunikasi Fisika Indonesia Vol 13, No 12 (2016)
Publisher : Komunikasi Fisika Indonesia

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Abstract

Fiber coupler was successfully developed by combining single mode fiber and fiber Bragg grating. A characterization of fiber coupler was analyzed based on result simulation by using OptiGrating software with varying long grating 1 ×104
KARAKTERISASI DAN PEMBUATAN FILM TIPISBARIUM STRONTIUM TITANAT Ba0,7Sr0,3TiO3 (BST)MENGGUNAKAN METODE SOL-GEL Rahmi Dewi
Komunikasi Fisika Indonesia Vol 13, No 13 (2016)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (765.632 KB) | DOI: 10.31258/jkfi.13.13.865-869

Abstract

Telah dilakukan penelitian film tipis Barium Strontium Titanat (BST) dengan komposisi , , menggunakan metode sol-gel dan di annealing pada suhu 600o C dan 650o C selama 1 jam. Film tipis BST tersebut dikarakterisasi menggunakan Field Emission Scanning Electron Microscopy (FESEM) dan Spektroskopi Impedansi. Hasil dari karakterisasi FESEM untuk sampel pada suhu 600o C dan 650o C masing-masing ketebalannya sebesar 46 nm dan 141 nm. Hasil dari karakterisasi Spektroskopi Impedansi yang diberikan nilai frekuensi, diperoleh nilai impedansi real dan impedansi imajiner. Nilai kapasitansi dari film tipis BST pada suhu 600o C dan 650o C masingmasing sebesar 75,46 F dan 154,69 F. Nilai konstanta dielektrik dari film tipis BST pada suhu 600o C dan 650o C masing-masing sebesar 23,98 dan 148,40.
PEMBUATAN DAN KARAKTERISASI KARBON AKTIF DARI BAMBU BETUNG (DENDROCALAMUS ASPER) DENGAN AKTIVASI KOH BERBANTUAN GELOMBANG MIKRO Erin Mazelly Hutapea; Iwantono Iwantono; Rakhmawati Farma; Saktioto Saktioto; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (694.344 KB) | DOI: 10.31258/jkfi.14.2.1061-1066

Abstract

Telah berhasil dibuat karbon aktif dari bahan bambu betung (Dendrocalamus Asper)melalui proses pra-karbonisasi selama 1 jam dengan aktivasi kimia menggunakan KOH dengan perbandingan variasi massa karbon aktif dengan massa aktivator 1:0, 1:1, 1:2 dan 2:1. Pengaktifan dibantu iradiasi gelombang dengan daya mikro (µ) 630 Watt selama 20 menit. Penelitian bertujuan untuk mengkarakterisasi karbon aktif menggunakan difraksi sinar-X, spektroskopi inframerah transformasi fourier (FTIR) dan dayaserapmetilenbiru. Karakterisasi difraksi sinar-X menunjukkan karbon aktif memiliki pola difraksi semikristalin dengan kehadiran puncak pada sudut 2θ sebesar 21,268o dan 41,014o masing-masing bersesuaian dengan orientasi (002) dan (100). Tinggilapisan (Lc) tertinggi dihasilkan pada rasio 1:1 sebesar 21,495 nm dan data ini didukung oleh daya serap karbon aktif terbaik terhadap metilen biru yaitu pada rasio 1:1 sebesar 99,327 mg/g. Hasil karakterisasai FTIR menunjukkan karbon aktif memiliki serapan gugus –OH, C-H dan C=C. Secara keseluruhan hasil perhitungan dan analisis yang diperoleh menunjukkan bahwa banyaknya KOH mempengaruhi kualitas dari karbonaktif yang dihasilkan.
Ionisasi Gas Butana pada Metode Pelepasan Listrik Tegangan Searah dengan Ketidakmurnian Udara Tekanan Tinggi, Plasma Termal Ikhsan Rahman Husein; Rakhmawati Farma; Saktioto Saktioto
Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.985 KB) | DOI: 10.31258/jkfi.14.1.1006-1012

Abstract

Penelitian ini dilakukan untuk menjelaskan ionisasi gas butana dengan campuran udara pada tekanan tinggi. Proses kelistrikan ini menggunakan elektroda grafit pensil yang digunakan untuk melucuti gas pembentukan plasma dengan metode electrical-discharge pada rentang tekanan atmosfir. Plasma Karbon diproduksi dengan mengoperasikan tegangan (DC)<3,5kV dan mengalirkan gas butana ke dalam tabung plasma. Hasil eksperimen menunjukkan tegangan jatuh dan arus listrik. Tegangan dan arus listrik diperoleh sebelum dan sesudah terjadi breakdown. Densitas dan temperatur plasma Karbon dihitung dari arus listrik dan tegangan jatuh. Hasil eksperimen menunjukkan ionisasi udara pada tekanan rendah memiliki tegangan maksimum 570V, tegangan jatuh 530-570V dan arus listrik 0,27-0,45mA, sedangkan pada tekanan tinggi memiliki tegangan maksimum 1160V, tegangan jatuh 900-1100V dan arus 0,46-0,6mA. Ionisasi yang terjadi saat penambahan gas butana (ketidakmurnian campuran udara) pada tekanan rendah memiliki tegangan maksimum 772V, tegangan jatuh 536-775V dan arus listrik 0,03-0,45mA, sedangkan pada tekanan tinggi memiliki tegangan maksimum 1044V, tegangan jatuh 675-1055V dan arus listrik 0,03-0,69mA. Hasil data ini berhubungan dengan variasi distribusi gas yang berada didalam tabung. Hasil eksperimen diharapkan dapat digunakan untuk pengembangan pertumbuhan Carbon Nano Tube pada ujung katoda.

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