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Applying the multi-zone model in predicting the operating range of HCCI engines

Ming JIA, Maozhao XIE, Zhijun PENG,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 414-423 doi: 10.1007/s11708-010-0108-8

Abstract: In this paper, a multi-zone model is developed to predict the operating range of homogeneous charge compressionsimulating an HCCI engine fueled with iso-octane, the knock and cycle-to-cycle variations predicted by the modeldifferent initial temperatures and equivalence ratios; the operating range was also well reproduced by the modelFurthermore, the model was applied to predict the operating range of the HCCI engine under different

Keywords: homogeneous charge compression ignition (HCCI) engine     multi-zone     operating range    

Isogeometric cohesive zone model for thin shell delamination analysis based on Kirchhoff-Love shell model

Tran Quoc THAI, Timon RABCZUK, Xiaoying ZHUANG

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 267-279 doi: 10.1007/s11709-019-0567-x

Abstract: We present a cohesive zone model for delamination in thin shells and composite structures.The isogeometric (IGA) thin shell model is based on Kirchhoff-Love theory.The fracture process zone is modeled by interface elements with a cohesive law.

Keywords: cohesive zone model     IGA     Kirchhoff-Love model     thin shell analysis     delamination    

A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 351-357 doi: 10.1007/s11708-013-0254-x

Abstract: The zone model has been widely applied in control analysis of heating, ventilation and air conditioningThis paper proposed a modified zone model which is much simpler in the HVAC system simulation and hasthe similar accuracy to the complicated simulation model.The efficacy of the proposed model was demonstrated by comparing it with the complicated model — heatThe predicted results from the proposed model well agreed with those from the complicated simulation.

Keywords: room model     thermal network analysis     transfer function     heating     ventilation and air conditioning (HVAC)    

Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 503-521 doi: 10.1007/s11709-023-0927-4

Abstract: approach for simulating the localized leakage behavior of segmentally lined tunnels based on a cohesive zonemodel.

Keywords: segmentally lined tunnel     localized leakage     cohesive element     hydraulic behavior     numerical modeling    

State of the Art of Compartment Fire Modeling

Zheng Xin,Yuan Hongyong

Strategic Study of CAE 2004, Volume 6, Issue 3,   Pages 68-74

Abstract: The relevant underlying physical assumptions are presented first and the conventional model performance

Keywords: compartment     field model     zone model     network model     FZN (field     zone and network) model     empirical model    

The Zone and Numerical Simulation on the Tunnel Fire

Li Yuanzhou,Huo Ran,Yi Liang,Shi Congling,Zhou Yunji

Strategic Study of CAE 2004, Volume 6, Issue 2,   Pages 67-72

Abstract: In this paper, given a tunnel, the smoke development in different situations was simulated using zonemodel (CFAST) with the multi-cell concept and field model (FDS).

Keywords: tunnel fire     zone model     field model     smoke development    

Cell-Zone Method: An Engineering Approach to Predict Smoke Movement in Large Scale Building Fire

Hu Longhua,Huo Ran,Liy Uanzhou,Wang Haobo

Strategic Study of CAE 2003, Volume 5, Issue 8,   Pages 59-63

Abstract: scale building fire, it is improper to predict smoke descending using traditional simple two-layer zonemodel, which divides the total space of the building into upper hot smoke layer and lower cool air layerIn this paper, an improved method, named Cell-Zone Method, is used to solve this problem, which firstdivides the total space into some small subspaces and then uses traditional two-layer zone model inzone model in large scale building, especially in buildings having large scale in one direction.

Keywords: large scale building     smoke movement     cell-zone method     zone-model    

Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 319-326 doi: 10.1007/s11783-014-0758-6

Abstract: In this study, by detecting the hindered zone from the complete thickening process of activated sludge, a simple model for the sludge thickening velocity, , describing the potential and performance of activatedsludge thickening in the hindered zone was developed.zone showed limited thickening.This empirical model was developed using batch settling data obtained from four WWTPs and validated using

Keywords: wastewater treatment plants     secondary settler     sludge thickening     sludge settling     hindered zone    

Studies of fiber-matrix debonding

Navneet DRONAMRAJU,Johannes SOLASS,Jörg HILDEBRAND

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 448-456 doi: 10.1007/s11709-015-0316-8

Abstract: system of carbon fiber reinforced composite (CFRP) AS4/Epson 828 material is studied using Cohesive ZoneModel (CZM).

Keywords: single fibre     cohesive zone model     interface debonding     carbon fiber reinforced composite (CFRP)    

Infinite Complanation for Semi-infinite Problem when Mass Concrete Hit by Cold Wave

Huang Dahai,Wang Congfeng

Strategic Study of CAE 2002, Volume 4, Issue 7,   Pages 33-39

Abstract: Then a semi-infinite plane model for surface temperature calculation is compared with infinite model.The temperature of surface zone in mass concrete under different boundaries is controlled by semi-infinitemodel, and is transferred to and calculated by an equivalent infinite model under certain conditionsmay be expressed as multi-line process approximately, and most importantly the temperature in surface zoneWith 400 mm × 400 mm × 220 mm concrete specimens, the temperatures in surface zone are experimentally

Keywords: concrete     temperature in surface zone     semi-infinite model     temperature declining process     equivalent conditionally     model test    

Model Tests and Comparative Study of the Pylon's Anchorage Zone of Two Long-span Cablae-stayed Bridges

Liu Zhao,Meng Shaoping,Lü Zhitao

Strategic Study of CAE 2003, Volume 5, Issue 12,   Pages 48-54

Abstract:

Two model tests for pylon´s anchorage zone of two long-span cable-stayed bridges, the SecondThe optimal configuration of prestress tendons in anchorage zone, and the emulation effects of segmentmodel test to integral pylon are investigated.

Keywords: cable-stayed bridge     pylon     model test     design research    

delamination on the stiffness of composite pipes under compressive transverse loading using cohesive zone

Sattar MALEKI, Roham RAFIEE, Abolfazl HASANNIA, Mohammad Reza HABIBAGAHI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1316-1323 doi: 10.1007/s11709-019-0555-1

Abstract: The stiffness test of filament wound composite pipes is simulated using cohesive zone method.Then the finite element model is developed for composite pips with delaminated areas with different primary

Keywords: delamination     composite pipes     stiffness test     cohesive zone method    

Simulation of cohesive crack growth by a variable-node XFEM

Weihua FANG, Jiangfei WU, Tiantang YU, Thanh-Tung NGUYEN, Tinh Quoc BUI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 215-228 doi: 10.1007/s11709-019-0595-6

Abstract: that combines the extended finite element method associated with variable-node elements and cohesive zonemodel is developed.By using a new enriched technique based on sign function, the proposed model using 4-node quadrilateralmodeling the equal stresses at both sides of the crack in the crack-tip as assumed in the cohesive model

Keywords: extended finite element method     cohesive zone model     sign function     crack propagation    

The geological recognition breakthrough in Liaodong zone, which leading to the discovery of the large

Deng Yunhua

Strategic Study of CAE 2011, Volume 13, Issue 10,   Pages 13-18

Abstract:

Liaodong zone includes eastern actic region of Liaozhong sag and LiaodongBased on deep research of geological condition and analysis on dry wells again in Liaodong zone, we recognized

Keywords: Bohai Liaodong zone     JX1-1     geological recognition     large oilfield    

effects of mismatch fracture properties in encapsulation-based self-healing concrete using cohesive-zonemodel

Luthfi Muhammad MAULUDIN, Chahmi OUCIF, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 792-801 doi: 10.1007/s11709-020-0629-0

Abstract: ratios embedded in the mortar matrix is analyzed numerically along with their interfacial transition zone

Keywords: self-healing concrete     interfacial zone     capsule materials     cohesive elements     fracture maps    

Title Author Date Type Operation

Applying the multi-zone model in predicting the operating range of HCCI engines

Ming JIA, Maozhao XIE, Zhijun PENG,

Journal Article

Isogeometric cohesive zone model for thin shell delamination analysis based on Kirchhoff-Love shell model

Tran Quoc THAI, Timon RABCZUK, Xiaoying ZHUANG

Journal Article

A modified zone model for estimating equivalent room thermal capacity

Hua CHEN, Xiaolin WANG

Journal Article

Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Journal Article

State of the Art of Compartment Fire Modeling

Zheng Xin,Yuan Hongyong

Journal Article

The Zone and Numerical Simulation on the Tunnel Fire

Li Yuanzhou,Huo Ran,Yi Liang,Shi Congling,Zhou Yunji

Journal Article

Cell-Zone Method: An Engineering Approach to Predict Smoke Movement in Large Scale Building Fire

Hu Longhua,Huo Ran,Liy Uanzhou,Wang Haobo

Journal Article

Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Journal Article

Studies of fiber-matrix debonding

Navneet DRONAMRAJU,Johannes SOLASS,Jörg HILDEBRAND

Journal Article

Infinite Complanation for Semi-infinite Problem when Mass Concrete Hit by Cold Wave

Huang Dahai,Wang Congfeng

Journal Article

Model Tests and Comparative Study of the Pylon's Anchorage Zone of Two Long-span Cablae-stayed Bridges

Liu Zhao,Meng Shaoping,Lü Zhitao

Journal Article

delamination on the stiffness of composite pipes under compressive transverse loading using cohesive zone

Sattar MALEKI, Roham RAFIEE, Abolfazl HASANNIA, Mohammad Reza HABIBAGAHI

Journal Article

Simulation of cohesive crack growth by a variable-node XFEM

Weihua FANG, Jiangfei WU, Tiantang YU, Thanh-Tung NGUYEN, Tinh Quoc BUI

Journal Article

The geological recognition breakthrough in Liaodong zone, which leading to the discovery of the large

Deng Yunhua

Journal Article

effects of mismatch fracture properties in encapsulation-based self-healing concrete using cohesive-zonemodel

Luthfi Muhammad MAULUDIN, Chahmi OUCIF, Timon RABCZUK

Journal Article