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Application of granular solid hydrodynamics to a well-graded unbound granular material undergoing triaxial

Shixiong SONG, Qicheng SUN, Feng JIN, Chuhan ZHANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 83-88 doi: 10.1007/s11709-012-0148-8

Abstract: Unbound granular materials (UGMs) are widely used as a base or a subbase in pavement construction.are generally well graded and exhibit a higher peak strength than that of conventional cohesionless granularBy using a simplified version of granular solid hydrodynamics (GSH), a set of GSH material constantsThe results indicate that the GSH theory is able to describe such a special type of granular materials

Keywords： granular solid hydrodynamics     unbound granular material (UGM)     triaxial tests    

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Hypoplastic constitutive modeling of wetting deformation of weathered rockfill materials

Erich BAUER, Zhongzhi FU, Sihong LIU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 78-91 doi: 10.1007/s11709-010-0011-8

Abstract: Recently, the hypoplastic constitutive model by Gudehus and Bauer was extended by introducing solid hardnesseffective stress state, the rate of deformation, and the time dependent process of degradation of the solidFinally, the constitutive model proposed is used to study the influence of a degradation of the solid

Keywords： rockfill dams     weathered granular materials     hypoplasticity     solid hardness     creep     stress relaxation    

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Nano thermo-hydrodynamics method for investigating cell membrane fluidity

YANG Yang, LIU Jing

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 121-128 doi: 10.1007/s11708-008-0033-2

Abstract: Such important issues can be clarified by modeling nano scale thermal hydrodynamics over the gap spaceA correlation between nano scale hydrodynamics, non-equilibrium thermodynamics and cell membrane activities

Keywords： responsible     phenomenological     phenomena     modes–lateral diffusion     differentiation    

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Alluvial channel hydrodynamics around tandem piers with downward seepage

Rutuja CHAVAN, Wenxin HUAI, Bimlesh KUMAR

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1445-1461 doi: 10.1007/s11709-020-0648-x

Abstract: In this paper, we report the turbulent flow structures and the scour geometry around two piers with different diameters. An experiment was conducted on a non-uniform sand bed with two types of tandem arrangements, namely, pier (T1) with a 75 mm front and 90 mm rear, and pier (T2) with a 90 mm front and 75 mm rear, with and without-seepage flows, respectively. A strong wake region was observed behind the piers, but the vortex strength diminished with downward seepage. Streamwise velocity was found to be maximum near the bed downstream of the piers and at the edge of the scour hole upstream of the piers. Quadrant analysis was used to recognize the susceptible region for sediment entrainment and deposition. Upstream of the piers near the bed, the moments, turbulent kinetic energy (TKE), and TKE fluxes were found to decrease with downward seepage, in contrast to those in a plane mobile bed without piers. The reduction percentages of scour depth at the rear pier compared with the front one were approximately 40% for T1 and 60% for T2. Downward seepage also resulted in restrained growth of scouring with time.

Keywords： scour     seepage     Strouhal number     tandem arrangement     turbulent characteristics    

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High velocity impact of metal sphere on thin metallic plate using smooth particle hydrodynamics (SPH)

Hossein ASADI KALAMEH, Arash KARAMALI, Cosmin ANITESCU, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 101-110 doi: 10.1007/s11709-012-0160-z

Abstract: In this paper, we present a smoothed particle hydrodynamics (SPH) method to model two-dimensional impact

Keywords： smoothed particle hydrodynamics     high velocity impact     sensitivity analysis    

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Mesoscopic properties of dense granular materials: An overview

Qicheng SUN, Feng JIN, Guohua ZHANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 1-12 doi: 10.1007/s11709-013-0184-z

Abstract: A granular material is a conglomeration of discrete solid particles.However, for granular flows and solid-like states, the theory is still poorly understood because of theThe current theory is that the mesoscale characteristics define the key differences between granularmaterials and homogeneous solid materials.A multiscale framework is then proposed for dense granular materials.

Keywords： granular matter     macroscopic structure     jamming phase transition    

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Effects of shear force on formation and properties of anoxic granular sludge in SBR

Xinyan ZHANG, Binbin WANG, Qingqing HAN, Hongmei ZHAO, Dangcong PENG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 896-905 doi: 10.1007/s11783-013-0539-7

Abstract: This paper reports the effects of shear force on anoxic granular sludge in sequencing batch reactorsanoxic granules in the SBR in order to investigate the effects of shear force on the formation of anoxic granulargranules with smaller diameters, high density and good settling ability were formed in the reactor, and 2) granularshear force, such as was applied in SBR1, this research demonstrated that: 1) the activity of anoxic granular

Keywords： denitrification     anoxic granular sludge     sequencing batch reactors (SBR)     shear force    

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Unconventional hydrodynamics of hybrid fluid made of liquid metals and aqueous solution under applied

Xu-Dong ZHANG, Yue SUN, Sen CHEN, Jing LIU

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 276-296 doi: 10.1007/s11708-018-0545-3

Abstract: investigations in this important area, the present paper is dedicated to summarizing this unconventional hydrodynamics

Keywords： liquid metal     hybrid fluid     hydrodynamics     surface tension     applied fields     self-actuation    

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Force fluctuations in sheared granular disks

Mingbo YUAN, Qicheng SUN, Feng JIN

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 46-49 doi: 10.1007/s11709-013-0189-7

Abstract: The internal structure established within granular materials, often observed as force chains, is dominantThese results help reveal the structure and mechanics of granular materials, and further investigations

Keywords： granular matter     force chain     stick and slip    

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CFD simulation of the hydrodynamics in an internal air-lift reactor with two different configurations

Mona EBRAHIMIFAKHAR, Elmira MOHSENZADEH, Sadegh MORADI, Mostafa MORAVEJI, Mahmoud SALIMI

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 455-462 doi: 10.1007/s11705-011-1116-x

Abstract: The model was used to predict the effect of the reactor geometry on the reactor hydrodynamics.

Keywords： airlift reactor     gas holdup     liquid circulation velocity     bubbly flow     computational fluid dynamics (CFD)    

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Visualization of force networks in 2D dense granular materials

Jianguo LIU, Qicheng SUN, Feng JIN,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 109-115 doi: 10.1007/s11709-010-0003-8

Abstract: Dense granular matter is a conglomeration of discrete solid and closely packed particles.photoelastic technique was improved for determining stresses and strains in the assemblies of photoelastic granular

Keywords： granular matter     force chain     multiscale modeling    

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Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 50-54 doi: 10.1007/s11709-013-0186-x

Abstract: Granular matter possesses impact-absorbing property due to its energy dissipation character.To investigate the impact-absorbing capacity of granular matter, the discrete element method (DEM) isadopted to simulate the impact of a spherical projectile on to a granular bed.The dynamic responses of the projectile are obtained for both thin and thick granular bed.Determining a suitable bed thickness is crucial to the buffering effect of granular matter.

Keywords： granular matter     impact peak     buffer capacity     discrete element method     critical thickness    

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Concept and application of anaerobic suspended granular sludge bed (SGSB) reactor for wastewater treatment

Mingxia ZHENG,Zhong YAN,Jiane ZUO,Kaijun WANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 797-804 doi: 10.1007/s11783-013-0597-x

Abstract: An analysis of the flow pattern of expanded granular sludge bed (EGSB) reactors shows that most EGSBA high-rate anaerobic suspended granular sludge bed (SGSB) reactor was then developed.

Keywords： expansion characteristic     high-rate bioreactor     anaerobic suspended granular sludge bed     expanded granular    

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Methanogenic community structure in simultaneous methanogenesis and denitrification granular sludge

Yujiao Sun, Juanjuan Zhao, Lili Chen, Yueqiao Liu, Jiane Zuo

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1067-2

Abstract:

• UASB with SMD granules was operated with high removal efficiency of COD and NO3--N.

• Methanosaetaceae was absolute predominant methanogen in SMD granules.

• The methanogen quantity and activity decreased as C/N decreased from 20:1 to 5:1.

• Bacterial community succession happened with C/N decreasing.

Keywords： Simultaneous methanogenesis and denitrification (SMD)     Methanogens     Community structure     Diversity index     Granular    

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Development of a constitutive model for rockfills and similar granular materials based on the disturbed

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 365-378 doi: 10.1007/s11709-012-0178-2

Abstract: It was found that both the stress level and the shear stress ratio, like most of granular materials,At lower shear stress ratios the behavior is much more similar to a nonlinear elastic solid.

Keywords： constitutive model     granular material     rockfill     plasticity     disturbed state concept     stress level    

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Title Author Date Type Operation

Application of granular solid hydrodynamics to a well-graded unbound granular material undergoing triaxial

Shixiong SONG, Qicheng SUN, Feng JIN, Chuhan ZHANG

Journal Article

Hypoplastic constitutive modeling of wetting deformation of weathered rockfill materials

Erich BAUER, Zhongzhi FU, Sihong LIU,

Journal Article

Nano thermo-hydrodynamics method for investigating cell membrane fluidity

YANG Yang, LIU Jing

Journal Article

Alluvial channel hydrodynamics around tandem piers with downward seepage

Rutuja CHAVAN, Wenxin HUAI, Bimlesh KUMAR

Journal Article

High velocity impact of metal sphere on thin metallic plate using smooth particle hydrodynamics (SPH)

Hossein ASADI KALAMEH, Arash KARAMALI, Cosmin ANITESCU, Timon RABCZUK

Journal Article

Mesoscopic properties of dense granular materials: An overview

Qicheng SUN, Feng JIN, Guohua ZHANG

Journal Article

Effects of shear force on formation and properties of anoxic granular sludge in SBR

Xinyan ZHANG, Binbin WANG, Qingqing HAN, Hongmei ZHAO, Dangcong PENG

Journal Article

Unconventional hydrodynamics of hybrid fluid made of liquid metals and aqueous solution under applied

Xu-Dong ZHANG, Yue SUN, Sen CHEN, Jing LIU

Journal Article

Force fluctuations in sheared granular disks

Mingbo YUAN, Qicheng SUN, Feng JIN

Journal Article

CFD simulation of the hydrodynamics in an internal air-lift reactor with two different configurations

Mona EBRAHIMIFAKHAR, Elmira MOHSENZADEH, Sadegh MORADI, Mostafa MORAVEJI, Mahmoud SALIMI

Journal Article

Visualization of force networks in 2D dense granular materials

Jianguo LIU, Qicheng SUN, Feng JIN,

Journal Article

Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Journal Article

Concept and application of anaerobic suspended granular sludge bed (SGSB) reactor for wastewater treatment

Mingxia ZHENG,Zhong YAN,Jiane ZUO,Kaijun WANG

Journal Article

Methanogenic community structure in simultaneous methanogenesis and denitrification granular sludge

Yujiao Sun, Juanjuan Zhao, Lili Chen, Yueqiao Liu, Jiane Zuo

Journal Article

Development of a constitutive model for rockfills and similar granular materials based on the disturbed

Mehdi VEISKARAMI, Ali GHORBANI, Mohammadreza ALAVIPOUR

Journal Article