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Indonesian Journal of Physics (IJP)

ijp
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Published by Institut Teknologi Bandung

ISSN : 23018151 EISSN : 29870828 DOI : https://doi.org/10.5614/itb.ijp

Core Subject : Science, Engineering,

Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

Indonesian Journal of Physics welcomes full research articles in the area of Sciences and Engineering from the following subject areas: Physics, Mathematics, Astronomy, Mechanical Engineering, Civil and Structural Engineering, Chemical Engineering, Electrical Engineering, Geotechnical Engineering, Engineering Science, Environmental Science, Materials Science, and Earth-Surface Processes. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.

Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik

Articles 334 Documents

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Permeability and Porosity of Two-Dimensional Porous Media Microchannels using Lattice Gas Cellular Automata Siti Nurul Khotimah; Bergas Bimo Branarto; Sparisoma Viridi; Idam Arif
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

In this study, lattice-gas cellular automata were used to solve the flow of incompressible Newtonian-fluid in porous media microchannels. We discuss fluid flow between two stationary parallel plates. By applying a constant pressure gradient, volumetric flux was determined as a function of time until a steady condition is achieved. For steady laminar flow, its velocity profile is parabolic. For flow in porous media between two stationary parallel plates, the results show that medium permeability depends on porosity and obstacle configurations. For a single obstacle, the permeability is a parabolic function with respect to positions of an obstacle in the direction perpendicular to the flow. The permeability is smallest when the obstacle is at the central line along the flow. A maximum permeability may be achieved when the obstacles attached to the channel wall. Other obstacle structures give lower permeability, even zero permeability for dead end microchannels.

Analysis on Fast Breeder Reactor (FBR) Performances and Plutonium Production Profile of Loading Minor Actinide (MA) in FBR Blanket Sidik Permana; Mitsutoshi Suzuki; Masaki Saito
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

An investigated process of recycling option based on minor actinide (MA) composition in the reactor design has been investigated which is based on fast breeder reactor (FBR) type as reference reactor type. The paper investigated some significant parameters of reactor operation, fuel sustainability and nuclear non-proliferation point of view. As initial fuel composition some composition of light water reactor (LWR) spent fuels are used and loaded into the such as mixed oxide (MOX) in the core regions and minor actinide doping is loaded into blanket regions. It is shows that criticality condition as indicating reactor operation time is obtained less for loading MA case in the blanket regions in comparing with no loading MA. It indicates a shorter reactor operation time is obtained for loading MA than without loading MA. Conversion rasio level or breeding rasio, is obtained less conversion rasio for loading MA which shows less fissile material production when some portion of U-238 is replaced by MA loading. Although, during reactor operation, some fissile plutonium materials such as Pu-239 are also produced from MA loading, however, it still less production in comparing with fissile plutonium production from direct process from converted U-238. It shows more Pu-238 can be produced than Pu-240 because of main portion of MA is Np-237 which can be directly produce more Pu-238 than Pu- 240. As protected plutonium composition (Pu-238 and Pu-240), loading MA produces some even mass plutonium isotopes in the blanket regions and loading 5 % of MA doping, obtains more than enough composition based on Kessler’criterion to estimate the level of technical difficulty for contructing explosive nuclear devices based on internal heating of Pu-238.

Study Neutronic of Small Pb-Bi Cooled Non-Refuelling Nuclear Power Plant Reactor (SPINNOR) with Hexagonal Geometry Calculation Dwita Nur Krisna; Zaki Su'ud
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

Nuclear reactor technology is growing rapidly, especially in developing Nuclear Power Plant (NPP). The utilization of nuclear energy in power generation systems has been progressing phase of the first generation to the fourth generation. This final project paper discusses the analysis neutronic one-cooled fast reactor type Pb-Bi is capable of operating up to 20 years without refueling. This reactor use Uranium Nitride Thorium as fuel and operating on power range 100– 500MWtNPPs. The method of calculation used a computer simulation program utilizing the SRAC. SPINNOR reactor design is designed with the geometry of hexagonal shaped terrace that radially divided into three regions, namely the outermost regions with highest percentage of fuel, the middle regions with medium percentage of fuel, and most in the area with the lowest percentage. SPINNOR fast reactor operated for 20 years with variations in the percentage of uranium-233 by 7%, 7.75% and 8.5%. Neutronik the calculation and analysis show that the design can be optimized in a fast reactor for thermal power output SPINNOR 300MWt with a fuel fraction 60% and variations of Uranium-233 enrichment of 7% - 8.5%

MPS simulation on melt penetration of CAFÉ experiment at 1200 C Asril Pramutadi Andi Mustari; Iksal Iksal; Sumiati Sumiati
Indonesian Journal of Physics Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012
Publisher : Institut Teknologi Bandung

After Fukushima accident, molten relocation inside the reactor is still unclear due to difficulties of detecting internal condition. Eutectic reaction is one of the main mechanism of internal structure liquefaction. Moving particle semi- implicit (MPS) is suitable of analyzing localized phenomena such as eutectic reaction due to its capability on simulating surface with large deformation. In this work, the MPS code for eutectic reaction was developed for calculating melting rate and its relocation process. Based on the MPS model, the CAFÉ core melt experiment was analyzed. For melting penetration rate of molten uranium into stainless steel at 1200 C, two dimensional MPS simulation predicted agreeable result.

Application of Seafloor Mapping Technology for Search and Rescue: AirAsia QZ8501 Case Study Rahadian Rahadian; Muhammad Irfan; Athur Yordan; Taufan Wiguna; Ouzani Bachir
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Seafloor mapping shows size, position, and depth of morphology and any objects at seafloor. Therefore, these technologies can be used to search and rescue (SAR) which are applied when AirAsia QZ8501 was missing at southern Karimata Strait using three vessels, RV. Baruna Jaya I, MV. Java Imperia, and KN. Trisula. Seafloor mapping technologies that applied were (i) multibeam echosounder system (MBES), (ii) side scan sonar (SSS), (iii) magnetometer (MM), (iv) autonomous underwater vehicle (AUV), (v) pinger locator (PL), (vi) underwater remotely operated vehicles (ROV). MBES, SSS, AUV, and USBL use acoustic wave that transmitted by transducer to seafloor then it back to reciever. Indirectly, MBES and SSS generate 3D image based on acoustics signal according to sound propagation and its travelling time in sea from transducer to receiver. MBES and SSS transmit acoustic wave with frequency 180 kHz for MBES and dual-frequency (120 kHz and 420 kHz) for SSS. AUV that attached SSS working with frequency 600/1600 kHz. USBL that used as pinger locator transmit acoustic wave with same frequency as blackbock which known using 37.5 kHz. USBL inform distance between transducer to blackbox, so that the position of blackbock can be determined by triangulation method. MBES and SSS on KR. Baruna Jaya I detect suspect anomaly with height about 3 meters. SSS that installed on AUV and operated on KN Trisula detect an object looks like human body. Triangulation method was done on MV. Java Imperia has found blackbox position.

The Constructions of Egg-Shaped Surface Equations using Hugelschaffer’s Egg-Shaped Curve Ahmat Rif’an Maulana; Mahmud Yunus; Dwi Ratna Sulistyaningrum
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Hugelschaffer’s egg-shaped curve is egg-shaped curve that is constructed by two non-concentric circles using Newton’s transformation known as hyperbolism. This study has goals to construct the egg-shaped surface equations using Hugelschafer’s egg-shaped curve that is rotated on x-axis, y-axis and z-axis; to get the volume formula of the egg-shaped solid and the egg-shaped surface area and also to visualize the egg-shaped surface equations using GeoGebra. Hugelschaffer’s egg-shaped curve is selected because its equation is simple. The procedures of the construction of the egg-shaped surface equations are done by drawing the curve on xy-plane and xz-plane, then it is rotated on axes of the coordinate. Whereas, the volume formula of the egg-shaped solid is gotten by using the disk method of the volume integral. The egg-shaped surface area is attained by using the integral of surface area. Visualisation of the egg-shaped surface equations are done by choosing vary of parameter values of the equations that aims to know the effect of the parameter values with the shaped surface.

Seismic Anisotropy in the Northern Sumatra Region from Shear Wave Splitting Arya Dwi Chandra; Bagus Jaya Santosa
Indonesian Journal of Physics Vol 33 No 1 (2022): Vol 33 No 1 (2022)
Publisher : Institut Teknologi Bandung

The northern Sumatra consists of several tectonic segments, such as subduction zone, the Sumatra and Mentawai faults. An analysis that can be used to identify the tectonic segments, located beneath the northern Sumatra, is shear wave- splitting. The purpose of the analysis of shear-wave splitting is to monitor the anisotropic characteristics of the structure of the earth layers located beneath the northern Sumatra. The monitoring data were collected from 4 BMKG stations with the magnitude was more than 6.3 Mw and the the range of the epicentral distance was about 85̊-140̊. The data analysis was conducted by using Splitlab program based on rotation-correlation method. The result of the shear-wave splitting analysis shows that there are two anisotropic layers. The delay time found in the first layer is about 0,5-0,9 s, which is assumed that it occurs due to the Sumatran fault. Meanwhile, the delay time found in the second layer is about 1,4-1,8 s, which is assumed that it occurs due to the subduction plate movement on the upper mantle layer. The results of TPTI, TSI and TRSI stations has shown congruence, that is the polarization direction is parallel to the Sumatra fault on the upper layer and the polarization direction is perpendicular to the Sumatra fault on the lower layer. The PSI station shows the polarization direction is different from the other stations, in which they show the polarization direction is perpendicular to the Sumatra fault on the upper layer and the polarization direction is parallel to the Sumatra fault on the lower layer. The difference of the data processing in the PSI station, we assume, is caused by the presence of a complex layer beneath Toba caldera.

Classical Approach for the Fusion Reaction of Deuterium-Tritium Using 2-D Velocity Verlet Method Dani Irawan; Sparisoma Viridi; RIzal Kurniadi; Abdul Waris
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Fusion reaction simulation of two types of nucleon: proton and neutron, is reported in this paper. The interactions between these nucleons are assumed to be only the nuclear force and electrostatic. The modeling is done in a classical approach where molecules formed by the nucleons are being collided with each other. In the model, some parameters were configured to see how these parameters affect the simulation. Some interesting results is that we can find a stable Helium-5 and a neutron-neutron pair as the product of the collision which should not have been possible due to the the quark interactions inside them. This leads us to a conclusion that we need to add a force-model for quark interaction. We do this by using an electrostatic-like force. However using this model, we may end up to instability of the tritium. In this paper we also report a configuration where the neutron-pair is unstable while tritium is stable.

Random Vibration Model in Linear and Non Linear Structure, Application in Engineering Structure Anwar Dolu; Amrinsyah Nasution
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Response of linear or complex nonlinear structures takes form in a characteristic functions and in the deterministic or stochastic external loads. Non linear model with non linear structure stiffness is a type of Duffing equation. Stochastic external loads system is referred to a random signal white noise with a constant power spectral density (So), while non linear system identification of deterministic system's is based on time history, phase plane and Poincare map. Methods of Galerkin and Runge-Kutta are used to solve the partial non linear governing diferential equations. Mean value , Standard deviation and Probability Density Function (PDF) is stated as statistical responses due to stochastic response of random variables. The analysis of random vibration in the solution of non linear stochastic differential equation is solved

Seismic Anisotropy in the Northern Sumatra Region from Shear Wave Splitting Arya Dwi Candra; Bagus Jaya Santosa
Indonesian Journal of Physics Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015
Publisher : Institut Teknologi Bandung

Page 26 of 34 | Total Record : 334

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Asril Pramutadi Andi Mustari

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Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

Location
Kota bandung,

Jawa barat

INDONESIA

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Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Asril Pramutadi Andi Mustari

Contact Email IJPhysicsITB@gmail.com

Phone +6222-2500834

Journal Mail Official ijp-journal@itb.ac.id

Editorial Address Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

Location Kota bandung, Jawa barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Asril Pramutadi Andi Mustari

Contact Email
IJPhysicsITB@gmail.com

Phone
+6222-2500834

Journal Mail Official
ijp-journal@itb.ac.id

Editorial Address
Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA

Location
Kota bandung,

Jawa barat

INDONESIA