Article
Engineering, Manufacturing
Kecai Long, Yesheng Zhong, Bing Wang, Xiaoliang Ma, Mingwei Li, Liping Shi, Xiaodong He, Shanyi Du
Summary: In this study, a stochastic finite element beam model was used to simulate the microstructure of fibrous porous ceramics. Two different interfiber connection models were introduced to investigate the influence of the sintering process on the material mechanical properties. The applicability of the connection models was determined through error analysis. The research findings can guide the preparation process of ceramic materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Thermodynamics
Hiroshi Terashima, Mitsuo Koshi
Summary: The present study focuses on CFD modeling of combustion flows under high-pressure conditions, considering the real-fluid effects in terms of thermodynamic properties, transport properties, and chemical kinetics. The results show that the real-fluid model provides better prediction accuracy for the mass burning rate compared to the ideal-gas model, particularly in the case of H2/O2/Ar flames. The study suggests that the pressure dependence of enthalpy is a metric to identify the real-fluid effects.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Review
Engineering, Mechanical
Junseon Park, Seungjin Lee, Joong Yull Park
Summary: This article summarizes the research on developing the iron ore sintering process as a CFD model. Researchers have found that optimizing the sintering process through CFD models can help reduce costs and environmental impact, while increasing efficiency.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Murray J. Thomson
Summary: The study of soot is driven by its negative impacts on health and the environment, but it is also relevant to the production of carbon black and hydrogen. Progress has been made in developing detailed models of soot formation in flames and reactors, and novel experimental techniques have provided new insights into its chemistry and properties. However, there are still important questions regarding the mechanism of soot formation and the factors affecting it, which need to be addressed for accurate prediction and application in various processes.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Engineering, Multidisciplinary
R. Ibanez, D. H. Kelley
Summary: This study presents a novel bioinspired experimental apparatus for studying peristaltic flows. The apparatus offers a wider range of modeling capabilities compared to previous designs and is particularly useful for systems with complex waveforms. The capabilities of the apparatus are validated through comparisons with analytic results, demonstrating its usefulness for biophysical studies.
BIOINSPIRATION & BIOMIMETICS
(2022)
Article
Energy & Fuels
Salah A. M. Elmoselhy, Waleed F. Faris, Hesham A. Rakha
Summary: In this study, a flexible crankshaft model for diesel engine intake manifold has been developed and validated. It was found that the flexibility of the crankshaft decreases the mass flow rate of air going into cylinders, leading to higher exhaust emissions. A simplified control model based on sensitivity analysis has been developed as well.
Review
Engineering, Mechanical
Sebastian Valencia, Sebastian Ruiz, Javier Manrique, Cesar Celis, Luis Fernando Figueira da Silva
Summary: This work reviews the main soot modeling approaches used in turbulent diffusion flames, describing the formation mechanisms and discussing the impact of combustion and radiation models on soot predictions, as well as analyzing the advantages and disadvantages of these models. It concludes that there is still a long way to go before developing a soot model capable of accurately describing the formation of this critical pollutant in various industrial scenarios.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Engineering, Chemical
Jipeng Dong, Guanghui Chen, Weiwen Wang, Junling Fan, Jianlong Li, Pan Zhang
Summary: This study proposes a novel falling film co-current flow cyclone demister (F2CFCD) to overcome the challenges of condensing and solidifying liquid droplets in the product gas stream, which may hinder the demister's performance and cause equipment blockage during gas-liquid separation. By introducing an additional stream of solvent fluid, a liquid film is formed on the wall of the F2CFCD, effectively dissolving the droplets and preventing crust formation. Numerical and experimental investigations reveal the high separation efficiency of droplets in the F2CFCD under various conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Review
Physics, Applied
Masaya Shigeta
Summary: This article reviews and discusses the recent progresses of studies with the concept of Computational plasma fluid mechanics, emphasizing the importance of studying thermal plasma processes as comprehensive fluid systems. The computational simulations have successfully captured hydrodynamic instabilities, flow dynamics, and complex behaviors in thermal plasma-nonionized gas coexisting systems and molten metal during arc welding. The study highlights the indispensability of the viewpoint and approaches of fluid mechanics and plasma physics, and suggests that computational study will play an increasingly important role in providing new insights.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Thermodynamics
Jean-Maxime Orlac'h, Nasser Darabiha, Sebastien Candel, Denis Veynante, Benedetta Franzelli
Summary: The synthesis of TiO2 in TiCl4-seeded flames is often described using phenomenological models, which qualitatively reproduce experimental trends but lack chemical insights into the kinetic pathways. Alternatively, thermodynamically-consistent oxidation kinetics of TiCl4 have been developed, but their applicability to flame synthesis needs to be assessed considering the presence of water molecules. This article presents numerical simulations of TiO2 flame synthesis, incorporating different chemical descriptions of TiCl4 conversion. Detailed oxidation kinetics without hydrolysis predict slow TiO2 formation at low O2 concentrations, leading to an underestimation of conversion yield. A new scheme combining detailed oxidation kinetics with a mechanism for TiCl4 hydrolysis is proposed, resulting in faster and more efficient TiCl4 conversion and log-normal particle size distributions that agree with experimental data for flame synthesis of nanoparticles.
COMBUSTION AND FLAME
(2023)
Review
Biophysics
M. Peirlinck, F. Sahli Costabal, J. Yao, J. M. Guccione, S. Tripathy, Y. Wang, D. Ozturk, P. Segars, T. M. Morrison, S. Levine, E. Kuhl
Summary: Precision medicine is a new approach in healthcare that customizes medical treatment based on each individual's genes, anatomy, physiology, and lifestyle. In the field of cardiovascular health, precision medicine shows promise in improving quality of life and reducing mortality rates. The role of human heart modeling in precision medicine is still being explored, but personalized models can be created using machine learning and population-based libraries, rather than requiring fully personalized high-resolution whole heart models.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2021)
Article
Engineering, Chemical
Abolfazl Malti, Arash Kardani, Abbas Montazeri
Summary: The study reveals a reverse correlation between solidification time and amorphous content, with the process controlled by dislocation slip at temperatures from 600-1000 K and by surface diffusion and thermal twinning beyond 1000 K. Optimal parameters are identified as a combination of dislocation slip and surface diffusion at 1000 K with 100 ps sintering. Temperature-dependent MSD diagrams are monitored for a detailed analysis of sintering dynamics.
Article
Engineering, Manufacturing
Vishwas Divse, Deepak Marla, Suhas S. Joshi
Summary: This work develops a 3D progressive damage model to predict drilling-induced damage and its effect on the load-carrying capacity of fiber reinforced plastics laminates. The model is validated and applied to simulate drilling and its induced damage, showing good agreement with experimental data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Jun Jiang, Pengwan Chen, Jiali Qiu, Weifu Sun, Sergei A. Chizhik, Alexander A. Makhaniok, Galina B. Melnikova, Tatiana A. Kuznetsova
Summary: The research found that Al nanoparticles transform from long-range ordered structure to short-range ordered structure and eventually into amorphous structure under high-speed impact, with a critical speed at which the atoms completely transform into amorphous structure. Surface atoms exhibit larger displacement than internal atoms during head-on impact, and various parameters experience different changes at different initial impact speeds.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Mechanical
M. Gani, I. F. Santos, M. Arghir, H. Grann
Summary: A novel approach of thermal coupling between fluid and solids, as well as the implementation of saturation curves to couple temperature, enthalpy, and vapor mass fraction, is presented in the study of a mechanical seal in two-phase flow. The model successfully solves for temperature fields, heat fluxes, enthalpy, and vapor mass fraction using a coupled method. Validation of the model is achieved through good agreement with literature results in various seal behavior and two-phase flow cases.
TRIBOLOGY INTERNATIONAL
(2022)
