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Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 137-141 doi: 10.1007/s11709-009-0028-z

Abstract: The paper’s main work concentrates on the experimental and numerical verification of the effectivityBoth experiments and numerical tests are performed.The numerical test illustrates the decline of when microcracks penetrate each other.

Keywords: microcrack detection     contact nonlinearity     numerical analysis    

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: Numerical models are developed and validated against published experimental data on HSS tubular membersreplicate the structural response recorded in the tests, some key modeling features including the employed numerical

Keywords: finite element     prestressing     tubular members     grout     high strength steel    

Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post mining: a column studyand numerical simulation analysis

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1702-4

Abstract:

● Column experiments with an inclined slope were applied to simulate NH4–N transport.

Keywords: Ion-absorbed rare earth     Ammonium nitrogen transport     HYDRUS-2D     Numerical simulation    

On braced trapezoidal corrugated steel shear panels: An experimental and numerical study

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 396-410 doi: 10.1007/s11709-023-0934-5

Abstract: In this study, a new system consisting of a combination of braces and steel infill panels called theAdditional numerical evaluations were carried out to investigate the effects of different parametersThe results obtained from the parametric study indicate that the corrugated steel shear panel (CSSP)

Keywords: trapezoidal corrugated plate     steel shear panel     braced steel shear panel     experimental study     buckling    

Numerical study on laminar flame speed of natural gas-carbon monoxide-air mixtures

Chen DONG, Qulan ZHOU, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 411-416 doi: 10.1007/s11705-010-0514-9

Abstract: Five stoichiometric natural gas-carbon monoxide-air mixtures are selected to study the detailed chemical

Keywords: laminar flame speed     numerical study     nonmonotonic increasing trend    

Numerical Study on the Parabolic Mild-slope Equation

Shen Yongming,Zheng Yonghong,Wu Xiuguang

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 30-35

Abstract: By numerical modeling wave transformation over four typical topographies, the accuracy of numerical schemessensitiveness of the models to the incident wave angle and the effect of weakly nonlinear terms on the numerical

Keywords: parabolic mild-slope equation     numerical study     wave    

Numerical study and control method of interaction of nucleation and boundary layer separation in condensing

Liansuo AN , Zhi WANG , Zhonghe HAN ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 254-261 doi: 10.1007/s11708-009-0047-4

Abstract: The numerical study provides a practical design method for turbine blade to reduce wetness losses.

Keywords: wet steam     two-phase flow     spontaneous condensation     numerical simulation     flow separation     profile loss    

Numerical Investigation of the Pressure Exponent in Gas Turbine Combustor Efficiency Similitude Study

Yang Rui,Wang Yingshi

Strategic Study of CAE 2003, Volume 5, Issue 10,   Pages 83-87

Abstract: effect of combustion process on the pressure exponent N in gas turbine combustor efficiency similitude studyis investigated by numerical simulation.

Keywords: combustor efficiency similitude study     pressure exponent     numerical simulation    

Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 335-343 doi: 10.1007/s11709-011-0121-y

Abstract: In this paper, a practical test and finite element analysis has been undertaken to further investigate the effects of contact buckling. A test rig was designed and constructed to record vertical and transverse deflections of compressively loaded steel skin plates. The boundary conditions were modeled as fully fixed. A finite element analysis was also undertaken using the software package Strand7. Results from both analyses have been examined and compared to data established from previous studies on contact buckling. Both the finite element analysis and practical results correlate well with this data. The result of the investigation has confirmed contact buckling theories and has foreshadowed the onset of the newly observed phenomenon of secondary contact buckling.

Keywords: compressive     buckling     thin steel skins     unilateral contact     rigid constraints    

A numerical study of helium-heated inorganic membrane reformer coupling to HTGR

YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 446-450 doi: 10.1007/s11708-007-0065-3

Abstract: Based on one-dimensional quasi-homogeneous model, a steady-state model and its computer program were developed for helium-heated inorganic membrane reformer coupling to high temperature gas-cooled reactor (HTGR). The results show

Keywords: temperature gas-cooled     one-dimensional quasi-homogeneous     steady-state     helium-heated    

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 279-293 doi: 10.1007/s11465-019-0575-5

Abstract: The numerical results also show that the time-step size does not have to be chosen to satisfy the critical

Keywords: isogeometric shape optimization     design-dependent boundary condition     transient heat conduction     implicit time integration     adjoint method    

Experimental study on concrete box culverts in trenches

Baoguo CHEN, Junjie ZHENG, Jie HAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 73-80 doi: 10.1007/s11709-009-0008-3

Abstract: In this paper, a full-scale experiment and numerical simulation were conducted to evaluate the variation

Keywords: culvert     vertical earth pressure     soil arch     full-scale experiment     numerical simulation    

Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads

Chunfeng ZHAO, Xin YE, Avinash GAUTAM, Xin LU, Y. L. MO

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 983-997 doi: 10.1007/s11709-020-0633-4

Abstract: In the present study, a theoretical model and nonlinear 3D model are developed and established to assess

Keywords: precast structure     fabricated concrete panel     blast resistance     theory model     empirical equation    

A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

Wenjiong CAO, Wenbo HUANG, Guoling WEI, Yunlong JIN, Fangming JIANG

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 439-449 doi: 10.1007/s11708-019-0612-4

Abstract: Underground non-Darcy fluid flow has been observed and investigated for decades in the petroleum industry. It is deduced by analogy that the fluid flow in enhanced geothermal system (EGS) heat reservoirs may also be in the non-Darcy regime under some conditions. In this paper, a transient 3D model was presented, taking into consideration the non-Darcy fluid flow in EGS heat reservoirs, to simulate the EGS long-term heat extraction process. Then, the non-Darcy flow behavior in water- and supercritical CO (SCCO )-based EGSs was simulated and discussed. It is found that non-Darcy effects decrease the mass flow rate of the fluid injected and reduce the heat extraction rate of EGS as a flow resistance in addition to the Darcy resistance which is imposed to the seepage flow in EGS heat reservoirs. Compared with the water-EGS, the SCCO -EGS are more prone to experiencing much stronger non-Darcy flow due to the much larger mobility of the SCCO . The non-Darcy flow in SCCO - EGSs may thus greatly reduce their heat extraction performance. Further, a criterion was analyzed and proposed to judge the onset of the non-Darcy flow in EGS heat reservoirs. The fluid flow rate and the initial thermal state of the reservoir were taken and the characteristic Forchheimer number of an EGS was calculated. If the calculated Forchheimer number is larger than 0.2, the fluid flow in EGS heat reservoirs experiences non-negligible non-Darcy flow characteristic.

Keywords: enhanced geothermal system     non-Darcy flow     heat extraction     Reynolds number     Forchheimer number    

Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 386-397 doi: 10.1007/s11708-011-0156-8

Abstract: By performing gas flow field numerical simulations for several inlet Reynolds numbers (from 2 × 10to 9 × 10 ) and byflow ratios (from 10% to 20%), the present study has proposed to improve the flowAn adjacent objective of the study is to lower pressure losses of the inlet particle separator (IPS).Similar numerical studies as those for the original shape have been conducted on this improved shape,in this study has succeeded in designing a shape which enhances the flow behavior.

Keywords: streamlines     pressure losses     flow passage improvement     inlet particle separator (IPS)    

Title Author Date Type Operation

Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Journal Article

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Journal Article

Migration of ammonium nitrogen in ion-absorbed rare earth soils during and post mining: a column studyand numerical simulation analysis

Journal Article

On braced trapezoidal corrugated steel shear panels: An experimental and numerical study

Journal Article

Numerical study on laminar flame speed of natural gas-carbon monoxide-air mixtures

Chen DONG, Qulan ZHOU, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Journal Article

Numerical Study on the Parabolic Mild-slope Equation

Shen Yongming,Zheng Yonghong,Wu Xiuguang

Journal Article

Numerical study and control method of interaction of nucleation and boundary layer separation in condensing

Liansuo AN , Zhi WANG , Zhonghe HAN ,

Journal Article

Numerical Investigation of the Pressure Exponent in Gas Turbine Combustor Efficiency Similitude Study

Yang Rui,Wang Yingshi

Journal Article

Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Journal Article

A numerical study of helium-heated inorganic membrane reformer coupling to HTGR

YIN Huaqiang, JIANG Shengyao, JU Huaiming, ZHANG Youjie

Journal Article

An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Journal Article

Experimental study on concrete box culverts in trenches

Baoguo CHEN, Junjie ZHENG, Jie HAN

Journal Article

Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads

Chunfeng ZHAO, Xin YE, Avinash GAUTAM, Xin LU, Y. L. MO

Journal Article

A numerical study of non-Darcy flow in EGS heat reservoirs during heat extraction

Wenjiong CAO, Wenbo HUANG, Guoling WEI, Yunlong JIN, Fangming JIANG

Journal Article

Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Journal Article