New strategy of solid/fluid coupling during numerical simulation of thermo-mechanical processes

In order to optimize the design method and improve the performance of hydraulic retarder, the numerical simulation of multi-field coupling of heat, fluid and solid is carried out to hydraulic retarder, based on the numerical computation and algorithm of heat-fluid coupling and fluid-solid coupling. The computation models of heat-fluid coupling and fluid-solid coupling of hydraulic retarder are created. The three dimensional model of hydraulic retarder is established based on CATIA software, and the whole flow passage model of hydraulic retarder is extracted on the basis of the three dimensional model established. Based on the CFD calculation and the finite element numerical simulation, the temperature field, stress field, deformation and stress state are analysised to hydraulic retarder in the state of whole filling when the rotate speed is 1600 r/min. In consideration of rotating centrifugal force, thermal stress and air exciting vibration force of blade surface, by using the sequential coupling method, the flow field characteristics of hydraulic retarder and dynamic characteristics of blade structure are analysised and researched based on multi-field coupling of heat, fluid and solid. These provide the theoretical foundation and references for parametric design of hydraulic retarder.

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Study on the Water-Physical Properties of the Cement-Plaster Bonded Rock-Like Materials

Advances in Civil Engineering ◽

10.1155/2021/8863064 ◽

2021 ◽

Vol 2021 ◽

pp. 1-7

Author(s):

Yong Zhang ◽

Zhiguo Cao ◽

Xiaomeng Shi

Keyword(s):

Physical Properties ◽

Physical Model ◽

Coupling Model ◽

Model Tests ◽

Physical Parameters ◽

Test Results ◽

Physical Model Tests ◽

Fluid Coupling ◽

Softening Coefficient ◽

Solid Fluid Coupling

The cement-plaster bonded rock-like material is one of the most commonly used materials to simulate different rocks in physical model tests. However, the applicability of this material in solid-fluid coupling model tests is not clear because there are few research studies on the water-physical properties of this material and its similarity to the actual rock is uncertain. This paper presents a systemic experimental study on the water-physical properties of the cement-plaster bonded rock-like materials. The parameters of rock-like materials, including water absorption, softening coefficient, and permeability coefficient, were compared with those of actual rocks to analyse the applicability of such material. Then, the influence of proportion on the water-physical properties of this material was discussed. By multiple regression analysis of the test results, empirical equations between the water-physical parameters and proportions were proposed. The equations can be used to estimate the water-physical properties of cement-plaster bonded rock-like materials with specific proportion and thus to select suitable materials in the solid-fluid coupling physical model tests.

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An extended partitioned method for conservative solid-fluid coupling

ACM Transactions on Graphics ◽

10.1145/3197517.3201345 ◽

2018 ◽

Vol 37 (4) ◽

pp. 1-12 ◽

Cited By ~ 11

Author(s):

Muzaffer Akbay ◽

Nicholas Nobles ◽

Victor Zordan ◽

Tamar Shinar

Keyword(s):

Fluid Coupling ◽

Partitioned Method ◽

Solid Fluid Coupling

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Effects of Perforation Pollution Zone on Fracture Initiation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.2761 ◽

2011 ◽

Vol 255-260 ◽

pp. 2761-2765

Author(s):

Su Ling Wang ◽

Qing Bin Li ◽

Zhen Xu Sun ◽

Zheng Wei Tian

Keyword(s):

Mechanical Model ◽

Transient Analysis ◽

Fracture Initiation ◽

Low Permeability ◽

Low Permeability Reservoir ◽

Fracture Pressure ◽

Key Factor ◽

Initiation Pressure ◽

Fluid Coupling ◽

Solid Fluid Coupling

Fracture initiation is a key factor of hydraulic fracturing, as lack of research on fracture initiation position.The perforation geostress mechanical model of low permeability reservoir is built according to the rock mechanics, seepage mechanics, elastic-plastic mechanics, considering solid-fluid coupling and rock material nonlinearity. Adopting the transient analysis, low-permeability reservoir geostress distribution of different stages is obtained using the finite element, such as drilling - cementing - perforation –fracturing. Determine the fracture initiation position and fracture pressure combining with the rock failure criterion. Calculated on well Ao332-32, the error rate of initiation pressure between test and calculation is 3.5 percent. It is proved that the model is reasonable.

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