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4th Research, Invention, and Innovation Congress: Innovative Electricals and Electronics, RI2C 2023

作者： Suwito, Galing Tirtojati Vorspohl, Julian Juntasaro, Ekachai Mechanical Engineering Simulation and Design Group The Sirindhorn International Thai-German Graduate School of Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Institute of Aerodynamics RWTH Aachen University Aachen Germany

ISBN: (纸本)9798350330618

The interface tracking method is one of the most critical issues in computational fluid dynamics (CFD) fields. This research extends a simplified volume of fluid (SVOF) method for interface tracking on multiphase flow to adaptive Cartesian grids. The SVOF method for uniform meshes is modified to ensure the accurate calculation of fluxes between cells at different resolutions. The adaptive mesh refinement (AMR) enables the grid to be refined in specific areas during the simulation to reduce the necessary computational effort. Several benchmark cases are carried out for validation, including linear and vortex advection cases. This study discusses the outcomes between uniform meshes and adaptively refined meshes. Different types of interpolation weights of the SVOF and the bandwidth size of the AMR are also varied to find the effect on the accuracy of the simulation. This study shows that the AMR technique can provide robust, conservative, and accurate interface tracking and is a promising candidate for the use in multiphase flow simulations. ©2023 IEEE.

关键词： Computational fluid dynamics

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Digital integration of total lifecycle tools for sustainable product design

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International Journal of Sustainable Manufacturing 2022年第2-4期5卷 217-237页

作者： Badurdeen, Fazleena Srivastava, Sanjeev Okunev, Dmitriy Jawahir, I.S. Department of Mechanical and Aerospace Engineering University of Kentucky LexingtonKY40506 United States Institute for Sustainable Manufacturing University of Kentucky LexingtonKY40506 United States Amazon ArlingtonVA22202 United States Research Group of Design and Representation Systems Department of Simulation and Digital Twins Siemens Technology 755 College Road East PrincetonNJ08540 United States

To promote sustainable manufacturing it is imperative that closed-loop material flows are considered during sustainable product design. The usefulness of various sustainable product design decision support tools depends on the ability to access accurate data related to the different lifecycle stages. The importance of digitally integrating disparate data sources and the potential for using digital threads to facilitate integration has been widely discussed. However, the approach to develop such digitally integrated capabilities is lacking in extant literature. This paper presents the development of an interoperable digital thread to integrate data from different sources across the total lifecycle interfaced with a suite of decision support tools. The application of the digitally integrated capability is demonstrated using an industrial case study. Results demonstrate the effectiveness of the digital thread to acquire data from different lifecycle stages and to conduct sustainability performance analyses to help identify the most sustainable product configuration designs. © 2022 Inderscience Enterprises Ltd.

关键词： Life cycle

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A Simplified Volume of Fluid Method for Interface Tracking on Adaptive Cartesian Grids

A Simplified Volume of Fluid Method for Interface Tracking o...

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Research, Invention, and Innovation Congress (RI2C)

作者： Galing Tirtojati Suwito Julian Vorspohl Ekachai Juntasaro Mechanical Engineering Simulation and Design Group The Sirindhorn International Thai-German Graduate School of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand Institute of Aerodynamics RWTH Aachen University Aachen Germany

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Emergent grain boundary phases in stressed polycrystalline thin films

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Physical Review Materials 2023年第8期7卷 083602-083602页

作者： Mengyuan Wang Ruilin Yan Xiao Han Hailong Wang Moneesh Upmanyu CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Hefei Anhui 230027 China Group for Simulation and Theory of Atomic-Scale Material Phenomena (stAMP) Department of Mechanical and Industrial Engineering Northeastern University Boston Massachusetts 02115 USA

The grain boundary (GB) microstructure influences and is influenced by the development of residual stresses during synthesis of polycrystalline thin films. Recent studies have shown that the frustration between the preferred growth direction and rotations of abutting crystals to local cusps in GB energies leads to internal stresses localized within nanoscopic surface layers around the valleys and ridges that form at emergent boundaries (eGBs). Using a combination of continuum frameworks, numerical analyses, and all-atom simulations of bicrystal 〈111〉 copper films, we show that eGBs tune their surface morphology and rotation extent in response to external strains. Compression favors rotation to and growth of low-energy GB phases (complexions) at eGB valleys while tension favors the transitions at eGB ridges, a reflection of the stress-induced mass efflux/influx that changes the energetic balance between interfacial and deformation energies. Molecular dynamics simulations of strained and growing bicrystal films reveal that the eGB phase transition is coupled to island formation at the surface triple junctions, providing a direct link between eGB phases and surface step flow. The interplay between eGB structure, morphology, and mechanics emerges as a crucial ingredient for predictive understanding of stress and morphological evolution during film growth, with broad implications for multifunctional response of polycrystalline surfaces in a diverse range of surface phenomena such as surface-mediated deformation, interfacial embrittlement, thermal grooving, stress corrosion, surface catalysis, and topological conduction.

关键词： Grain boundaries Interface & surface thermodynamics Surface & interfacial phenomena Surface reconstruction Solid-solid interfaces Thin films Molecular dynamics

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A simple and high -performance immobilization technique of membrane protein from crude cell lysate sample for a membrane-based immunoassay application

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Journal of Immunoassay and Immunochemistry 2023年第1期44卷 76-89页

作者： Khemthongcharoen, Numfon Uawithya, Panapat Yookong, Nutthapon Chanasakulniyom, Mayuree Jeamsaksiri, Wutthinan Sripumkhai, Witsaroot Pattamang, Pattaraluck Juntasaro, Ekachai Kamnerdsook, Ampol Houngkamhang, Nongluck Promptmas, Chamras Department of Biomedical Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand NECTEC National Science and Technology Development Agency (NSTDA) Pathumthani Thailand Department of Physiology Faculty of Medicine Siriraj Hospital Mahidol University Bangkok Thailand Department of Clinical Chemistry Faculty of Medical Technology Mahidol University Bangkok Thailand Center for Standardization and Product Validation Faculty of Medical Technology Mahidol University Bangkok Thailand Thai Microelectronics Center (TMEC) NECTEC National Science and Technology Development Agency (NSTDA) Chachoengsao Thailand Mechanical Engineering Simulation and Design Group The Sirindhorn International Thai-German Graduate School of Engineering (TGGS) King Mongkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand College of Materials Innovation and Technology King Mongkut’s Institute of Technology Ladkrabang (KMITL) Bangkok Thailand

Membrane proteins are difficult to be extracted and to be coated on the substrate of the immunoassay reaction chamber because of their hydrophobicity. Traditional method to prepare membrane protein sample requires many steps of protein extraction and purification that may lead to protein structure deformation and protein dysfunction. This work proposes a simple technique to prepare and immobilize the membrane protein suspended in an unprocessed crude cell lysate sample. Membrane fractions in crude cell lysate were incorporated with the large unilamellar vesicle (LUV) that was mainly composed of POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) before coating in the polystyrene plate by passive adsorption technique. Immunofluorescence staining and the Enzyme-Linked Immunosorbent Assay (ELISA) examination of a strictly conformation-dependent integral membrane protein, Myelin Oligodendrocyte Glycoprotein (MOG), demonstrate that LUV incorporated cell lysate sample obviously promotes MOG protein immobilization in the microplate well. With LUV incorporation, the dose–response curve of the MOG transfected cell lysate coating plate can be 2–9 times differentiated from that of the untransfected cell lysate coating plate. The LUV incorporated MOG transfected cell lysate can be efficiently coated in the microplate without carbonate/bicarbonate coating buffer assistance. © 2022 Taylor & Francis.

关键词： conformation-dependent immunoassay crude cell lysate coating enzyme-linked immunosorbent assay Membrane protein immobilization unilamellar vesicle preparation

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Acceptability of Automated Robotic Clinical Breast Examination: Survey Study

Journal of Participatory Medicine

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Journal of Participatory Medicine 2023年 15卷 e42704页

作者： Jenkinson, George P. Houghton, Natasha van Zalk, Nejra Waller, Jo Bello, Fernando Tzemanaki, Antonia Bristol Robotics Laboratory Department of Mechanical Engineering University of Bristol Bristol United Kingdom Centre for Engagement and Simulation Science Department of Surgery and Cancer Imperial College London London United Kingdom Dyson School of Design Engineering Imperial College London London United Kingdom Cancer Prevention Group School of Cancer & Pharmaceutical Sciences King’s College London London United Kingdom

Background: In the United Kingdom, women aged 50 to 70 years are invited to undergo mammography. However, 10% of invasive breast cancers occur in women aged ≤45 years, representing an unmet need for young women. Identifying a suitable screening modality for this population is challenging;mammography is insufficiently sensitive, whereas alternative diagnostic methods are invasive or costly. Robotic clinical breast examination (R-CBE)—using soft robotic technology and machine learning for fully automated clinical breast examination—is a theoretically promising screening modality with early prototypes under development. Understanding the perspectives of potential users and partnering with patients in the design process from the outset is essential for ensuring the patient-centered design and implementation of this technology. Objective: This study investigated the attitudes and perspectives of women regarding the use of soft robotics and intelligent systems in breast cancer screening. It aimed to determine whether such technology is theoretically acceptable to potential users and identify aspects of the technology and implementation system that are priorities for patients, allowing these to be integrated into technology design. Methods: This study used a mixed methods design. We conducted a 30-minute web-based survey with 155 women in the United Kingdom. The survey comprised an overview of the proposed concept followed by 5 open-ended questions and 17 closed questions. Respondents were recruited through a web-based survey linked to the Cancer Research United Kingdom patient involvement opportunities web page and distributed through research networks’ mailing lists. Qualitative data generated via the open-ended questions were analyzed using thematic analysis. Quantitative data were analyzed using 2-sample Kolmogorov-Smirnov tests, 1-tailed t tests, and Pearson coefficients. Results: Most respondents (143/155, 92.3%) indicated that they would definitely or probably use R

关键词： automated diagnosis breast cancer breast cancer detection breast examination health care robotics mammography participatory design patient and public involvement user acceptability

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Stability and energetics of two-dimensional surface crystals in liquid AuSi thin films and nanoscale droplets

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Physical Review Materials 2021年第7期5卷 074003-074003页

作者： Hailong Wang Mengyuan Wang Alireza Shahabi Alain Karma Moneesh Upmanyu CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Hefei Anhui 230027 China Group for Simulation and Theory of Atomic-Scale Material Phenomena (stAMP) Department of Mechanical and Industrial Engineering Northeastern University Boston Massachusetts 02115 USA Department of Physics Northeastern University Boston Massachusetts 02115 USA

We employ atomic-scale computational frameworks to study the surface crystallization in AuSi films and droplets as a function of composition, temperature, and size. Above the melting point, the surfaces of both thin films and droplets undergo a first-order transition from a two-dimensional (2D) Au2Si crystalline phase to a laterally disordered yet stratified layer. The thin film surfaces exhibit an effective surface tension that increases with temperature and decreases with Si concentration, while for droplets in the size range 10–30 nm, the bulk Laplace pressure alters the surface segregation as it occurs with respect to a strained bulk. Above the transition, the size effect on the surface tension due to the stratified surface layer is small, while the crystalline surface layer below the transition is strained and composed of 2D crystallites separated by extended grain boundary scars that lead to large fluctuations in its energetics. As a specific application, all-atom simulations of AuSi droplets on Si(111) substrate subject to Si surface flux show that the supersaturation dependent surface tension destabilizes the contact line via formation of a precursor wetting film on the solid-vapor interface and has ramifications for size selection during droplet-catalyzed routes for nanowire growth. Our study sheds light on the interplay between stability and energetics of surfaces in this unique class of binary alloys and offers pathways for exploiting their surface structure for varied applications such as catalytic nanocrystal growth, dealloying, and polymer crystallization.

关键词： Crystal forms Growth Interface & surface thermodynamics Nanocrystals Structural phase transition 2-dimensional systems Surfaces Molecular dynamics

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Evaluation of critical experiments in the university of Wisconsin nuclear reactor (UWNR) with uncertainty quantification

Evaluation of critical experiments in the university of Wisc...

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2020 International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future, PHYSOR 2020

作者： Park, Young-Hui Cheng, Ye Elzohery, Rabab Wilson, Paul P.H. Roberts, Jeremy A. DeHart, Mark D. Computational Nuclear Engineering Research Group Department of Engineering Physics University of Wisconsin-Madison 1415 Engineering Drive MadisonWI53705 United States Computation and Optimization for Reactor Physics Simulation Group Department of Mechanical and Nuclear Engineering Kansas State University 3002 Rathbone Hall ManhattanKS66506 United States Reactor Physics Analysis and Design Department Idaho National Laboratory Idaho FallsID83415 United States

ISBN: (纸本)9781713827245

An improved computational model of the University of Wisconsin Nuclear Reactor (UWNR) was developed to support the benchmark evaluation of recent data acquired during an experimental campaign conducted at UWNR. Previous efforts led to a scripted UWNR model for automated generation of MCNP6 and Serpent inputs. This capability was extended to SCALE/KENO. All three tools were used to evaluate a variety of zero-power, fresh-critical configurations, and the results agreed well. The MCNP6 model was extended to support shuffling the core configuration, which allows the modeling of burnup for evaluation of depleted critical configurations. The MCNP6 model successfully predicts core reactivity over time, after accounting for the initial reactivity bias. The inclusion of SCALE/KENO input generation enables sensitivity and uncertainty analyses using the TSUNAMI and Sampler modules of SCALE. A preliminary uncertainty analysis was performed with TSUNAMI for nuclear data uncertainties while direct perturbation calculations were performed using MCNP6 for geometry and material uncertainties, which helped to identify model parameters with the largest effect on the eigenvalue. A transient UWNR transport Model in Mammoth/Rattlesnake is under development to simulate the transient experiments. The existing MCNP6 and Serpent models are used to provide the CAD file for meshing and homogenized cross-sections. In conclusion, the evaluation of UWNR benchmark data provides increased confidence in various states of the UWNR computational model and will provide a unique model for use by other analysts. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://***/licenses/by/4.0/).

关键词： Uncertainty analysis

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Unusual Ordering Behavior of Co3al-Based Γ′ Phase with L12 Structure Predicted by the Thermodynamic Model with Support of First-Principles Calculations

SSRN

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SSRN 2022年

作者： Ali, Hamid Chen, Rong Chen, Hailian Zhao, Yan Zhao, Panhong Yang, Shuwen Wu, Bo Wen, Jiansen Zhang, Chubo Weng, Liangji Xie, Tianliang Cai, Qi Zhang, Longkun He, Zhihan Yao, Qipeng Zhang, Haifeng Sa, Baisheng Wen, Cuilian Lin, Maohua Liu, Yu Wang, Chunxu Multiscale Computational Materials Facility Key Laboratory of Eco-Materials Advanced Technology College of Materials Science and Engineering Fuzhou University Fuzhou350100 China Materials Design and Manufacture Simulation Facility School of Advance Manufacturing Fuzhou University Jinjiang 362200 China Department of Ocean and Mechanical Engineering Florida Atlantic University Florida Boca Raton33431 United States Central Iron & Steel Research Institute Group Beijing100081 China

The temperature and composition-dependent site preferences of the binary Co3Al, ternary, and quaternary Co3Al-based γ′ phase alloyed with Mi (Mi = Cr, Cu, Fe, Mn, Mo, Ni, Re, Ta, Ti, V, or W) were calculated for the first time using a two-sublattice thermodynamic model involving site occupying fractions (SOFs). The SOFs were calculated using a thermodynamic software package based on a thermodynamic database established in this work, where the temperature-dependent thermodynamic data were obtained using first-principles and phonon spectrum calculations. There is an obvious order-disorder transition for the stoichiometric and non-stoichiometric binary Co3Al as well as in ternary and quaternary Co3Al-based γ′ phase around the solvus temperature, while this character was not found in its counterpart Ni3Al-based γ′ phase. The additional alloying elements Mi modulate the order-disorder transition characteristics of Co3Al-based γ′-precipitate with different amplitudes. Based on the causal relationship of structure and mechanical properties, according to the modulating amplitude of the order-disorder transition behavior, we recommend that adding the additional alloying elements such as Cu, Mn, and Mo atoms make the mechanical properties degrade gradually, and thus the structural components avoid sudden damage, which is beneficial for the safety of the engine component at high operating temperature. © 2022, The Authors. All rights reserved.

关键词： Binary alloys

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Centrifugal Microfluidic Based Painless Blood Sample Collection for Hematocrit Measurement

Centrifugal Microfluidic Based Painless Blood Sample Collect...

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Biomedical engineering International Conference (BMEiCON)

作者： Santi Rattanavarin Thanapat Sangkharat Ekachai Juntasaro Witsaroot Sripumkhai Pattaraluck Pattamang Norabadee Ranron Numfon Khemthongcharoen Chompunoot Sinthupibulyakit Chamras Promptmas Chayapitcha Saesue Jiraskul Udarwudhipong Wutthinan Jeamsaksiri Department of Production and Robotics Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand Mechanical Engineering Simulation and Design Group (MESD) Sirindhorn International Thai-German Graduate School of Engineering (TGGS) King Mongkut’s University of Technology North Bangkok (KMUTNB) Bangkok Thailand Thai Microelectronics Center (TMEC) National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Chachoengsao Thailand Infrastructure Development Division (IDD) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand National Electronics and Computer Technology Center (NECTEC) National Science and Technology Development Agency (NSTDA) Pathum Thani Thailand Faculty of Medical Technology Huachiew Chalermprakiet University Samut Prakan Thailand Department of Biomedical Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand

This work demonstrates a centrifugal microfluidic chip design for painless blood collection and hematocrit measurement. The fluid channel in the microfluidic chip was fabricated using a laser-cutting method. An optimal dimension of the negative pressure chamber was designed to control the maximum sample volume obtained for further hematocrit examination. The estimated blood sample of 20 µl could be obtained based on the negative pressure driven by finger press actuation on the negative pressure chamber of the microfluidic chip. The repeatability of blood volume collection evaluated by a laboratory technician was 21.126±0.001 µl with a coefficient of variation (CV) of 5.32%. The sample volume used in this centrifugal microfluidic chip was around three times lower than that used in the standard method. Pack red cell preparation for hematocrit examination in the microfluidic chip could be achieved using a centrifugation speed around 2.4 times lower than that used in the standard method. The hematocrit examination by our centrifugal microfluidic chip and the standard method was 41.75±0.77 (1.84 %CV), and 41.5±0.71 (1.7 %CV), respectively. The results showed that the hematocrit measurements in our centrifugal microfluidic chip were compatible with those measured by the standard method.

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