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Directional solidification of metal-gas eutectic and fabrication of regular porous metals

LIU Yuan, LI Yanxiang, WAN Jiang

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2, Pages 180-183 doi: 10.1007/s11465-007-0030-x

Abstract: Directional solidification of metal-gas eutectic (Gasar) is a novel process for making regular porous

Keywords： orientation solid-gas eutectic research solidifying porosity

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Novel casting processes for single-crystal turbine blades of superalloys

Dexin MA

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 3-16 doi: 10.1007/s11465-018-0475-0

Abstract: review of the current casting techniques for single-crystal (SC) blades, as well as an analysis of the solidificationThe parallel heating and cooling system was developed to achieve symmetric thermal conditions for SC solidificationdeveloped to enable the establishment of a high temperature gradient for SC growth and the freckle-free solidification

Keywords： superalloy investment casting Bridgman process directional solidification single crystal turbine blade

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Premature melt solidification during mold filling and its influence on the as-cast structure

M. WU, M. AHMADEIN, A. LUDWIG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 53-65 doi: 10.1007/s11465-017-0437-y

Abstract:

Premature melt solidification is the solidification of a melt during mold filling.this study, a numerical model is used to analyze the influence of the pouring process on the premature solidificationsolid crystals in the melt at the end of pouring are used as the initial conditions for the subsequent solidificationA five-phase volume-average model for mixed columnar-equiaxed solidification is used for the solidificationbetween the simulation and experimental results is achieved by considering the effect of premature melt solidification

Keywords： premature solidification mold filling as-cast structure modeling

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Improved directional-distance filter

JIN Lianghai, LI Dehua

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2, Pages 205-211 doi: 10.1007/s11465-008-0025-2

Abstract: By combining the weighting function and the traditional directional-distance filter (DDF) in a novelway, a new vector filter - the adaptive distance-weighted directional-distance filter (ADWDDF) - is presented

Keywords： information distance-weighted directional-distance ADWDDF traditional DDF spatial-distance weighting

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Analysis of molten metal spreading and solidification behaviors utilizing moving particle full-implicit

Frontiers in Energy 2021, Volume 15, Issue 4, Pages 959-973 doi: 10.1007/s11708-021-0753-0

Abstract: different outlet diameters and sample amounts to investigate the effect of the outlet for spreading-solidificationIn the MPFI framework, the melting-solidification model including heat transfer, radiation heat loss,In addition, the difference in the spreading and solidification behavior due to the outlet diametersThe simulation results reveal the detailed solidification procedure during the molten metal spreading

Keywords： molten metal spreading solidification particle method severe accident fuel debris decommissioning

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A Bayesian modeling approach to bi-directional pedestrian flows in carnival events

S. Q. XIE, S. C. WONG, William H. K. LAM

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 483-489 doi: 10.15302/J-FEM-2017023

Abstract: Bi-directional pedestrian flows are common at crosswalks, footpaths, and shopping areas.

Keywords： pedestrian flow model bi-directional interactions empirical studies Bayesian inference

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Acoustic characteristics of bi-directional turbines for thermoacoustic generators

Dongdong LIU, Yanyan CHEN, Wei DAI, Ercang LUO

Frontiers in Energy 2022, Volume 16, Issue 6, Pages 1027-1036 doi: 10.1007/s11708-020-0702-3

Abstract: Bi-directional turbines combined with rotary motors may be a feasible option for developing high powerA general expression for the acoustic characteristics of the bi-directional turbine was proposed basedThe good fit of the correlations shows that these characteristics are valid for describing the bi-directional

Keywords： thermoacoustic power generator acoustic characteristics bi-directional impulse turbine energy conversion

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Novel technologies for the lost foam casting process

Wenming JIANG, Zitian FAN

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 37-47 doi: 10.1007/s11465-018-0473-2

Abstract: developed several novel LFC technologies, namely, LFC technologies under vacuum and low pressure, vibration solidification, and pressure solidification conditions; expendable shell casting techno- logy; and preparation technology

Keywords： LFC under vacuum and low pressure vibration solidification pressure solidification expendable shell casting

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Cement-based solidification/stabilization of contaminated soils by nitrobenzene

Jianguo LIU, Xiaoqin NIE, Xianwei ZENG, Zhaoji SU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 3, Pages 437-443 doi: 10.1007/s11783-012-0406-y

Abstract: The cement-based solidification/stabilization (S/S) of nitrobenzene (NB) contaminated soils, with cement

Keywords： solidification/stabilization nitrobenzene contaminated soils powder activated carbon

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Improvement of solidification model and analysis of 3D channel blockage with MPS method

Frontiers in Energy 2021, Volume 15, Issue 4, Pages 946-958 doi: 10.1007/s11708-021-0754-z

Abstract: In the study described in this paper, a novel solidification model for analyzing melt flowing channelstep over the “mushy zone” (between the solidus and liquidus temperature) for accurate modeling of solidification

Keywords： water reactor (BWR) severe accident channel blockage moving particle semi-implicit (MPS) method solidification

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Solidification Science and Technology and Materials

Fu Hengzhi,Wei Bingbo,Guo Jingjie

Strategic Study of CAE 2003, Volume 5, Issue 8, Pages 1-15

Abstract:

In view of the development of the solidification science and practice, the present paper introducesframework of the current solidified materials system and the basic principles in main developing stages of solidificationengineering is carrying out in wide scale research and development in the fields of high-quality castings, directionalsolidification, crystal growth, rapid solidification, solidification of melt supercooling and othernew type and extraordinary solidification processes aiming at precisely controlling structure, shape

Keywords： material science solidification technology solidification process

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Progress of Materials Processing and Solidification Technologies

Jie Wanqi

Strategic Study of CAE 2002, Volume 4, Issue 6, Pages 1-4

Abstract:

By analyzing the progress of materials processing, the application and the importance of solidificationIt is pointed out that the solidification technologies offer some new method´s for the preparationSome emerging research topics about solidification processing and the possible technological progresses

Keywords： materials processing solidification technology

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Computer Simulation of Metal Solidification Microstructures

Zhu Mingfang,Yu Jin,Hong Junzhuo

Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 8-16

Abstract: It is playing an increasing important role in the studies of microstructural evolution during solidificationIn this paper, the recent progress in computer simulation of solidification microstructures is brieflyVarious models including deterministic and stochastic approaches for the prediction of solidification

Keywords： solidification microstructure computer simulation Cellular Automaton Model

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An integrated method for the rapid dewatering and solidification/stabilization of dredged contaminated

Hefu Pu, Aamir Khan Mastoi, Xunlong Chen, Dingbao Song, Jinwei Qiu, Peng Yang

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1359-1

Abstract: Using this method, dewatering and solidification/stabilization can be carried out simultaneously such

Keywords： Dredged contaminated sediment Dewatering Solidification/stabilization Vacuum preloading Prefabricated

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Influence of the intensity and loading time of direct current electric field on the directional migration

Xiaoyu Wang,Yuxuan Gao,Haigang Shi,Na Liu,Wei Zhang,Hongbo Li

Frontiers of Medicine 2016, Volume 10, Issue 3, Pages 286-296 doi: 10.1007/s11684-016-0456-9

Abstract:

Exogenic electric fields can effectively accelerate bone healing and remodeling through the enhanced migration of bone marrow mesenchymal stem cells (BMSCs) toward the injured area. This study aimed to determine the following: (1) the direction of rat BMSC (rBMSC) migration upon exposure to a direct current electric field (DCEF), (2) the optimal DCEF intensity and duration, and (3) the possible regulatory role of SDF-1/CXCR4 axis in rBMSC migration as induced by DCEF. Results showed that rBMSCs migrated to the positive electrode of the DCEF, and that the DCEF of 200 mV/mm for 4 h was found to be optimal in enhancing rBMSC migration. This DCEF strength and duration also upregulated the expression of osteoblastic genes, including ALP and OCN, and upregulated the expression of ALP and Runx2 proteins. Moreover, when CXCR4 was inhibited, rBMSC migration due to DCEF was partially blocked. These findings indicated that DCEF can effectively induce rBMSC migration. A DCEF of 200 mV/mm for 4 h was recommended because of its ability to promote rBMSC migration, proliferation, and osteogenic differentiation. The SDF-1/CXCR4 signaling pathway may play an important role in regulating the DCEF-induced migration of rBMSCs.

Keywords： DCEF migration osteogenesis differentiation rBMSCs SDF-1/CXCR-4