3D Simulation of Self‐Compacting Concrete Flow Based on MRT‐LBM

Qiu, Liu-Chao; Han, Yu

doi:10.1155/2018/5436020

Cited by 13 publications

(7 citation statements)

References 21 publications

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“…Each boundary particle k therefore experiences a force per unit mass given by Eq. (15) where, f ka is the force per unit mass exerted by the fluid particle a on the boundary particle k , which is given by For the motion of the moving body, the basic equations of rigid body dynamics can then be used where M is the mass of the object, I the moment of inertia, V the velocity, the rotational velocity and R 0 the centre of mass. Equations Eqs.…”

Section: Coupled Sph-dem Methodsmentioning

confidence: 99%

“…Due to the change of concrete proportioning and properties, the linear relationship of Bingham model at this stage is difficult to characterize all concrete stress–strain relationships. Subsequent studies have improved the linear relationship of the Bingham model, making the model retain the original yield stress with the addition of a nonlinear fit 15 , i.e., , which adds a power-law index that allows the model to characterize shear thinning or shear thickening phenomena. The classical computational fluid dynamics (CFD) approach treats concrete as a single fluid phase, ignoring the coarse aggregates, reinforcing fibers and other large scale particles in it, and calculates the concrete mesh flux to obtain the velocity variation and shear deformation region of the concrete flow process 16 .…”

Section: Introductionmentioning

confidence: 99%

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Research on rheological behavior of fresh concrete single-cylinder pumping based on SPH-DEM

Wu,

Chen,

et al. 2023

Sci Rep

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In contrast to traditional approaches to simulating fresh concrete, the model applied here allows issues such as liquid phase and the motion of sub-scale particles to be considered. The rheological behavior of fresh concrete materials was investigated, and the slump test and pumping process of fresh concrete were simulated by combining the smooth particle hydrodynamics coupled with discrete element method. Based on Bi-viscosity model and Bingham model, linear and nonlinear fitting of rheometer data and the derivation equations were educing. Bi-viscosity model and the Bingham model were compared in slump test. The results show that the Bi-viscosity model is more accurate in simulation, and the error percentage is less than 10%. The Bi-viscosity model was used to simulate and predict the results of slump experiment, and the influence of rheological parameters on the slump velocity and shape was obtained. The simulation analysis model of concrete single-cylinder pumping is established, and the experimental and simulation analysis models are compared. The results show that the SPH-DEM pumping pressure prediction is very close to the experimental results.

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Section: Coupled Sph-dem Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on rheological behavior of fresh concrete single-cylinder pumping based on SPH-DEM

Wu,

Chen,

et al. 2023

Sci Rep

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“…This further would have given a clearer understanding of the micro-behavior of the strain stresses during the flow model of the self-compacting concrete under gravitational flow and plastic deformation along the flow path. A multiple relaxation time optimized LBM has been applied by Qui and Han 35 in the flow of self-compacting concrete based on the 3D format and the model of discrete velocity and a constitutive mode of the H–B was adopted in the model execution as the modifier. The slump flow and the L-box passing configurations were used in the study and the modeled numerical values were matched with the values from the available literature.…”

Section: Constitutive Analytical Rheological Models In Sccmentioning

confidence: 99%

A critical review of rheological models in self-compacting concrete for sustainable structures

Onyelowe,

Kontoni

2023

Sci Rep

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Studying the rheological behavior of concrete, especially self-compacting concrete is vital in the design and structural integrity of concrete structures for design, construction, and structural material sustainability. Both analytical and numerical techniques have been applied in the previous research works to study precisely the behavior of the yield stress and plastic viscosity of the fresh self-compacting concrete with the associated flow properties and these results have not been systematically presented in a critical review, which will allow researchers, designers and filed operators the opportunity to be technically guided in their design and model techniques selection in order to achieve a more sustainable concrete model for sustainable concrete buildings. Also, the reported analytical and numerical techniques have played down on the effect of the shear strain rate behavior and as to reveal the viscosity changes of the Bingham material with respect to the strain rate. In this review paper, a critical study has been conducted to present the available methods from various research contributions and exposed the inability of these contributions to revealing the effect of the shear strain rate on the rheological behavior of the self-compacting concrete. With this, decisions related to the rheology and flow of the self-compacting concrete would have been made with apt and more exact considerations.

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“…No. Besides experimental studies, several numerical models have been developed to simulate the filling process of RFC, such as Distinct Element Method (DEM) 5 , Lattice Boltzmann Method (LBM) 6,7 , Smoothed Particle Hydrodynamics (SPH) method 8 and LBM-DEM hybrid model 9 . HSCC was modelled as a two-phase Bingham fluid in the last hybrid model, where coarse aggregates were simulated by DEM and motor was considered to be Bingham fluid modelled by LBM.…”

Section: Workability Of Hscc and Compactness Of Rfcmentioning

confidence: 99%

Research on Rock-Filled Concrete Dams: a Review

Feng¹,

Zhou²,

Huang³

2018

EasyChair Preprints

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Rock-Filled Concrete (RFC) is an innovative mass concrete technology. To date, RFC technology has been used to build a great number of gravity dams and arch dams. Since it was invented in 2003, many experimental and numerical research works have been conducted. During the construction process of RFC, an assembly of large rocks with more than 300 mm in grain size, called rockfill, can be cemented with a high-performance self-compacting concrete (HSCC). The RFC technology combines the advantages of masonry and concrete, in that it decreases cement consumption, lowers temperature rise of cement hydration, and reduces shrinkage of concrete. This paper aims at acquainting readers with a timely review of state-of-the-art research on RFC technology, including (1) workability of HSCC and compactness of RFC, (2) thermal and mechanical properties of RFC, (3) structures of an RFC dam and (4) construction and quality control measurements.

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3D Simulation of Self‐Compacting Concrete Flow Based on MRT‐LBM

Cited by 13 publications

References 21 publications

Research on rheological behavior of fresh concrete single-cylinder pumping based on SPH-DEM

Research on rheological behavior of fresh concrete single-cylinder pumping based on SPH-DEM

A critical review of rheological models in self-compacting concrete for sustainable structures

Research on Rock-Filled Concrete Dams: a Review

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