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Numerical optimization of load support of the single textured lubricated contact with boundary slip

(Conference Paper) (Open Access)

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Laboratory for Engineering Design and Tribology, Mechanical Engineering Department, Engineering Faculty, Diponegoro University, Semarang, Central-Java, 50275, Indonesia

Abstract

Textured surfaces containing macro texture in one of the surfaces are the subject of a great deal of research to enhance tribological characteristic (higher low support but lower friction) of the bearing. In this paper, a general parametric model of the groove texture proﬁle of single textured contact with boundary slip is developed and the exact optimization method is adopted to obtain the global-optimum texture proﬁle of the lubricated sliding contact. The optimization objective is the maximization of the load support of the lubricant. The results show that there is a shift of the texture location to the centre of the contact with lower texture length. It is also found that the optimal single textured bearing can help to improve the load support up to 75%. © Published under licence by IOP Publishing Ltd.

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Indexed keywords

Engineering controlled terms:

Physics

Engineering uncontrolled terms

Lubricated contacts Lubricated sliding contact Numerical optimizations Optimization method Parametric modeling Textured bearings Textured surface Tribological characteristics

Engineering main heading:

Optimization

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Journal of Physics: Conference Series

Volume 1090, Issue 1, 28 September 2018, Article number 012068

International Conference on Computation in Science and Engineering, ICCSE 2017; Bandung Institute of Technology (ITB) CampusBandung; Indonesia; 10 July 2017 through 12 July 2017;

Code 140021

Tauviqirrahman, M.  Noorkarim, M.F. Arijanto Muchammad 

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Lubrication | Texturing | Hydrodynamic lubrication

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ISSN: 17426588

Source Type: Conference Proceeding Original language: English

DOI: 10.1088/1742-6596/1090/1/012068 Document Type: Conference Paper Sponsors:

Publisher: Institute of Physics Publishing

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Scopus coverage years: from 2005 to 2019 Publisher: Institute of Physics Publishing ISSN: 1742-6588 E-ISSN: 1742-6596

Subject area: Physics and Astronomy: General Physics and Astronomy

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Journal of Physics: Conference Series

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International Conference on Computation in Science and Engineering

To cite this article: 2018 J. Phys.: Conf. Ser. 1090 011001

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Published under licence by IOP Publishing Ltd

1234567890 ‘’“”

International Conference on Computation in Science and Engineering IOP Publishing IOP Conf. Series: Journal of Physics: Conf. Series 1090 (2018) 011001 doi :10.1088/1742-6596/1090/1/011001

PREFACE

The role of computation and simulation to support research activities in sciences and technologies has become more important in recent decades. The International Conference on Computation in Science and Engineering (ICCSE) 2017 has been conducted in Bandung Institute of Technology (ITB) campus, Bandung, Indonesia, on 10-12 July 2017.

This conference is organized by Bandung Institute of Technology (ITB, Indonesia) and supported by UIN Sunan Gunung Jati University. This conference aims at summarizing recent research activities relevant to the computation application in science and engineering and facilitate communication among relevant experts.

More than 150 people from Indonesia, Japan, Malaysia, India, Australia, Korea, and some other countries have participated in this conference. About 150 presentations including 9 plenary talks are presented. The presentations are grouped into 12 areas of particular interest: (1): Complex system Modelling, (2): Energy System Computation, (3): Fluid Dynamics Computation, (4): Artificial Intelligent and Soft Computing, (5): High Energy Physics, (6): Simulation in general, (7): Quantum Computation, (8) HPC, (9): Material Computation, (10): Sub surface modelling and computation, (11): Nuclear and Radiation Computation, and (12): Atmospheric and meteorological computation.

From about 100 full papers submitted after the conference for publication in IOP conference proceedings, after peer review process by relevant experts, 83 papers were accepted for publication in this proceeding. We are indebted to all of authors for submitting their original papers.

We would like to thank all participants, all members of the International Board, members of the Organizing Committee, and I express my gratitude to all those who helped the success of this conference.

Zaki Su’ud Dwi Irwanto

ICCSE 2017 Chairman ICCSE 2017 Co-Chairman

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ICCSE 2017

iccse2017.interconf.org

[FINAL CALL] Abstract Submission [FINAL CALL]

To submit an abstract, authors must do registration first using our Submission System. The whole submission process is

done fully online (NOT by email) to guarantee smooth administration.

Accepted papers of ICCSE 2017 are planned to be submitted to

IOP Journal of Physics: Conference Series*

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NOTICE: Ensuring subscriber access to content on IOPscience throughout the coronavirus outbreak - see our remote access guidelines.

Accepted papers received: 20 August 2018 Published online: 28 September 2018

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Neutronic Comparison Study Between Pb(208)-Bi and Pb(208) as a Coolant In The Fast Reactor With Modified CANDLE Burn up Scheme.

Nina Widiawati¹, Zaki Suud¹, Dwi Irwanto¹, Hiroshi Sekimoto²

1Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Science, Bandung Institute of Technology, Indonesia.

2Nuclear Engineering, Tokyo Institute of Technology, Japan

[email protected]

Abstract. Neutronic study of Pb(208)-Bismuth as a coolant in the Lead Fast Reactor (LFR) with Modified CANDLE burn up scheme has been conducted. Lead cooled fast reactor (LFR) is one of the fourth-generation reactor designs. The reactor is designed with 500 MW thermal power output. Modified CANDLE burn-up scheme allows the reactor to have long life operation by supplying only natural uranium as fuel cycle input. This scheme introducing discrete region, the fuel is initially put in region 1, after one cycle of 10 years of burn up it is shifted to region 2 and region 1 is filled with fresh natural uranium fuel. The reactor is designed for 100 years with 10 regions arranged axially. The neutronic calculations were performed by SRAC code using nuclear data library based on JENDL 4.0. Level burn up of Pb(208)-Bi cooled fast reactor is 530.688 GWD/MTU at BOC and 433.051 GWD/MTU at EOC whereas 190.790 GWD/MTU at BOC and 433.051 GWD/MTU at EOC for Pb(208) . The effective multiplication factor of Pb(208)-Bi Cooled Fast Reactor is 1.0554 at BOC and 1.05958 at EOC whereas 1.06703 at BOC and 1.06816 at EOC for Pb208.

1. Introduction

The accident of Chernobyl, Three Miles Island (TMI) and Fukushima Daichi has led to an emphasis on passive safety in the design of advanced reactors. Generation IV International Forum (GIF) has chosen six reactor systems for further development. The six reactor system chosen were: Gas Cooled Fast Reactor (GFR), Lead Cooled Fast Reactor (LFR), Molten Salt Reactor (MSR), Sodium Cooled Fast Reactor (SFR), Supercritical Water Cooled Reactor (SCWR), and Very High-Temperature Reactor (VHTR). Generation IV reactor systems has several specific goals, they were: inherent safety, sustainability, non-proliferation, and economical.

1.1. Lead Cooled Fast Reactor (LFR)

LFR is one of the six selected reactor systems. Some advantages of the LFR system [12]:

1. The potential for high outlet liquid metal temperature (up to 850^$𝐶) would enable the LFR to meet the hydrogen and electricity production missions.

2. The fast neutron spectrum would facilitate achieving the actinide fissioning mission

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AMIR CPU: World’s First and Only 32-bit Softcore Processor in Schematic on Freeware Platform

Dr. Muhammad Nasir Ibrahim¹, Namazi Azhari², Adam Baharum², Dr. Mariani Idroas¹, Uswah Khairudin¹, Johari Kassim¹, Md Mohar Muhammad¹

1Universiti Teknologi Malaysia,

2Pahlawan Mikropemproses Sdn Bhd

Abstract. The developing world has always been a spectator and consumer participant in the ICT technology since the pioneering computing years of post second world war of world economic growth. The developed world led by the US, Europe, Japan, and later South Korea have surged far ahead in ICT being represented by their own creation of microprocessor platforms evolving into an exclusive club which they locked with licensing. Their early advantage of mostly trial and error processor designs have proven to be a market success that discouraged new aspiring contenders. New CAD tools have arrived along with the cloud computing model presenting new opportunities. Major ICT developments such as the Microsoft Catapult project in 2012, and the Intel purchase of Altera for USD16.7 billion in 2016 should be perceived as alert warnings. To us this is the perfect time to capitalize on the mistakes of the earlier processor designs to create a new and novel 32-bit processor for the rest of the free world to hop along the ICT revolution into the cloud and IoT applications on Freeware platform as active creative participants. These aspirations have to begin at the education level with an easy to learn 32-bit processor model.

Keywords: Freeware, Softcore, RISC/CISC, FPGA, HDL/VHDL/Verilog

1. Introduction

We believe that for the developing countries to enter the playing field in ICT in order to create technological innovations of their own, it is imperative to have control over one platform that is a major building block of ICT: the microprocessor which is free from licensing beginning at the education level. ICT education tools have advanced so far as to be able to leapfrog the traditional methods of circuit wiring of breadboarding by supplanting with Freeware development tools and Intellectual-Property (IP) components. This freeware IP is the AMIR 32-bit softcore processor which is also multi-platform able to target all similarly capable devices from different vendors.

The processor was created in schematic so as to be able to reach a wide user-base of science and engineering professionals including occasional users such as scientists, students, and hobbyists.

Unlike HDL (Hardware Description Language) design entry such as VHDL and Verilog which are favored by electronic design engineers which require steep learning curve, the schematic design entry requires virtually zero learning curve.

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Dynamics, Circuit Design and Fractional-Order Form of a Modified Rucklidge Chaotic System

A Sambas^1,2, S Vaidyanathan³, M Mamat², M Sanjaya WS⁴, S H Yuningsih⁴, K Zakaria⁴ and Subiyanto⁵

1Department of Mechanical Engineering, Universitas Muhammadiyah Tasikmalaya, Indonesia (Corresponding author)

2Faculty of Informatics and Computing, Universiti Sultan Zainal Abidin, Kuala Terengganu, Malaysia

3Research and Development Centre, Vel Tech University, Chennai, Tamil Nadu, India

4Department of Physics, Universitas Islam Negeri Sunan Gunung Djati Bandung, Indonesia

5Department of Marine Science, Faculty of Fisheries and Marine Science, Padjadjaran University, Indonesia

Corresponding author’s e-mail address: [email protected]

Abstract. Rucklidge chaotic system is a nonlinear mechanical model of a double convection process. In this paper, we modify the dynamics of a Rucklidge chaotic system by adding a nonlinear term and derive a new chaotic system. The nonlinear dynamics of the proposed chaotic system is described through numerical simulations which include the stability analysis of equilibrium points, phase portraits, Lyapunov exponents, Kaplan-Yorke dimension, bifurcation diagram and a Poincarè map. For specific values of the parameters, the proposed system displays periodic and chaotic behaviour. In addition, a new circuit implementation of the modified Rucklidge chaotic system is reported and examined in MultiSIM. A good qualitative agreement is shown between the simulations and the MultiSIM results.

Furthermore, the fractional-order form of the modified Rucklidge chaotic system is numerically studied. By tuning the commensurate fractional order, the new chaotic system displays chaotic and periodic attractors, respectively.

1. Introduction

Since Lorenz found the 3-D model for atmospheric convection in 1963 [1], chaos has been intensively studied and many chaotic systems have been discovered in the literature. In [2], Rössler constructed a seven-term chaotic system with just one quadratic nonlinearity. In [3-4], Rikitake discovered a new chaotic system to explain the irregular polarity switching of the earth’s geomagnetic field. A model to explain the irregular variability in the luminosity of stars was presented in 1976 [5] and this system is known as the Moore-Spiegel system.

In [6], Rucklidge discovered a double convection chaotic model in a horizontal layer of Boussinesq fluid with lateral constraints. In 1994, Sprott described 19 algebraically simple chaotic systems [7]. In 2000, Malasoma proposed the simplest dissipative jerk equation that is parity invariant [8].

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Journal of Physics: Conference Series

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International Conference on Computation in Science and Engineering 10-12 July 2017, Bandung, Indonesia

Accepted papers received: 20 August 2018 Published online: 28 September 2018

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Dynamics, Circuit Design and Fractional-Order Form of a Modified Rucklidge Chaotic System

1. Introduction