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Science and Engineering, ICCSE 2017 17426S88 28 September 2018,1TB Penerbit: Institute of Physics Publishing http://iopscience.iop.org/article/l 0.1088/1742-6S96/1090/1/012042

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Numerical evaluation of number of textures in slip-textured lubricatedcontact (Conference Paper) (Open Access)

, ,

Laboratory for Engineering Design and Tribology, Mechanical Engineering Department, Engineering Faculty,Diponegoro University, Indonesia

AbstractSurface texturing with slip can have a significant effect on the lubrication performance in hydrodynamic bearing. Inthe present paper, the texture shape consisting of parabola, rectangular, and triangular for partially texture bearing isof particular interest. Number of the texture cells are also varied to obtain the optimal tribological performance interms of load support and friction force. The slip is located at the leading edge of the contact to achieve the highest performance . The modified Reynolds equation with slip is adopted and discretized using finite volume method. The

tridiagonal matrix algorithm is used to solve this equation. The numerical results show that the number of texturecells has a significant effect on the load support as well as the friction force. However, it is also found that there is notexture shape which is superior for all performances. Thus, a particular care must be chosen with respect to thenumber of textures as well as the texture shapes to obtain the optimal tribological performance . This finding can beused as a guideline to design the bearing with optimal performance . © Published under licence by IOP PublishingLtd.

SciVal Topic Prominence

Topic:

Prominence percentile: 95.394

Indexed keywords

Engineeringcontrolled terms:

Finite volume method Matrix algebra Tribology

Engineeringuncontrolled terms

Hydrodynamic bearings Lubricated contacts Lubrication performance

Modified Reynolds equation Numerical results Optimal performance

Tri-diagonal matrix algorithms Tribological performance

Engineering mainheading:

Friction

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Journal of Physics: Conference SeriesVolume 1090, Issue 1, 28 September 2018, Article number 012042International Conference on Computation in Science and Engineering, ICCSE 2017; BandungInstitute of Technology (ITB) CampusBandung; Indonesia; 10 July 2017 through 12 July 2017;Code 140021

Yohana, E. Ajie, W.K. Tauviqirrahman, M.

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Drag reduction | Molecular dynamics | Boundary slip

ISSN: 17426588Source Type: Conference ProceedingOriginal language: English

DOI: 10.1088/1742-6596/1090/1/012042Document Type: Conference PaperSponsors:Publisher: Institute of Physics Publishing

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Effect of texture shape on thehydrodynamic lubricationperformance of the slidingtextured contact: A numericalapproach

Susilowati Tauviqirrahman, M.Jamari, J.

Numerical optimization of loadsupport of the single texturedlubricated contact with boundaryslip

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References (8)

Brajdic-Mitidieri, P., Gosman, A.D., Ioannides, E., Spikes, H.A.

(2005) Journal of Tribology, 127 (4), pp. 803-812.  .doi: 10.1115/1.2032990

Uddin, M.S., Ibatan, T., Shankar, S.

(2017) Lubrication Science, 29 (3), pp. 153-181.  .

doi: 10.1002/ls.1362

Tala-Ighil, N., Fillon, M., Maspeyrot, P.

(2011) Tribology International, 44 (3), pp. 211-219.  .doi: 10.1016/j.triboint.2010.10.003

Rao, T.V.V.L.N., Rani, A.M.A., Nagarajan, T., Hashim, F.M.

(2012) Tribology International, 56, pp. 121-128.  .doi: 10.1016/j.triboint.2012.06.010

Tauviqirrahman, M., Muchammad, Jamari, Schipper, D.J.

(2013) Tribology Transactions, 57 (1), pp. 134-145.  .

doi: 10.1080/10402004.2013.854943

Tauviqirrahman, M., Ajie, W.K., Yohana, E., Muchammad, M., Jamari, J.

(2016) International Journal of Engineering and Technology, 8 (2), pp. 913-921.  .

Susilowati, S., Tauviqirrahman, M., Jamari, J., Bayuseno, A.P.

(2016) Tribology - Materials, Surfaces and Interfaces, 10 (2), pp. 86-89.  .

doi: 10.1080/17515831.2016.1159781

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A study of slip position on improving the hydrodynamic lubrication performance ofsingle-textured bearing using a mass conserving numerical approach

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Numerical investigation of the combined effects of slip and texture on tribologicalperformance of bearing

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Muchammad, M., Tauviqirrahman, M., Jamari, J., Schipper, D.J.

(2017) Lubrication Science, 29 (3), pp. 133-152.  .

doi: 10.1002/ls.1361

Yohana, E.; Laboratory for Engineering Design and Tribology, Mechanical Engineering Department, EngineeringFaculty, Diponegoro University, Indonesia; email: © Copyright 2018 Elsevier B.V., All rights reserved.

8

An analytical approach on the tribological behaviour of pocketed slider bearings withboundary slip including cavitation

Cited 13 timeshttp://www.interscience.wiley.com/jpages/0954-0075

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efnan2003@gmail.com

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1

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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) 012071 doi :10.1088/1742-6596/1090/1/012071

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

ninawidiawati@gmail.com

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. IntroductionThe 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

1

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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) 012003 doi :10.1088/1742-6596/1090/1/012003

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.

1

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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) 012038 doi :10.1088/1742-6596/1090/1/012038

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

A Sambas1,2, 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: acengs@umtas.ac.id

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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