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| 1 | The characterization of the time-dependent nonlinear viscoelastic of an LDPE melt using a simple thixotropy model显示文摘A new simple thixotropy model was proposed in the present paper to characterize the thixotropy-loop experiments and the start-up experiment of an LDPE (PE-FSB23D022/Q200) melt. The thixotropy model is a combination of a viscoelastic-component and a postulated kinetics process of structure change, which is constituted in terms of the indirect microstructural approach usually adopted in the characterization of thixotropy. The descriptions of the thixotropy model on both the thixotropy-loop tests and the startup test show good agreement with the experimental values, indicating the good capability of the model in characterizing the time-dependent nonlinear viscoelastic. The stress overshoot phenomenon and the stress relaxation after cessation of the thixotropy loop test can be described well by the model, whereas both of the typical viscoelastic phenomena could not be described in our previous work with a variant Huang model. | Shuxin Huang Chuanjing Lu | 2005 | Acta Mechanica Sinica2005，21，4： | 6 |
| 2 | Fluid-structure interaction simulation of three-dimensional flexible hydrofoil in water tunnel显示文摘The closely coupled approach combined with the finite volume method(FVM) solver and the finite element method(FEM) solver is used to investigate the fluid-structure interaction(FSI) of a three-dimensional cantilevered hydrofoil in the water tunnel. The FVM solver and the coupled approach are verified and validated by comparing the numerical predictions with the experimental measurements, and good agreement is obtained concerning both the lift on the foil and the tip displacement. In the noncavitating flow, the result indicates that the growth of the initial incidence angle and the Reynolds number improves the deformation of the foil, and the lift on the foil is increased by the twist deformation. The normalized twist angle and displacement along the span of the hydrofoil for different incidence angles and Reynolds numbers are almost uniform. For the cavitation flow, it is shown that the small amplitude vibration of the foil has limited influence on the developing process of the partial cavity, and the quasi two-dimensional cavity shedding does not change the deformation mode of the hydrofoil. However, the frequency spectrum of the lift on the foil contains the frequency which is associated with the first bend frequency of the hydrofoil. | Shiliang HU Chuanjing LU Yousheng HE | 2016 | Applied Mathematics and Mechanics(English Edition)2016，37，1： | 5 |
| 3 | 3-D NUMERICAL SIMULATION OF UNDERWATER EXPLOSION BUBBLE显示文摘3-DNUMERICALSIMULATIONOFUNDERWATEREXPLOSIONBUBBLELuChuanjing(ShanghaiJiaoTongUniversity,Shanghai,China,200030)Abstract:Thepro... | Lu Chuanjing(Shanghai Jiao Tong University, Shanghai, China, 200030) | 1996 | Chinese Journal of Aeronautics1996，9，1： | 5 |
| 4 | 2008 Stability Analysis of the Immersed Boundary Method for a Two-Dimensional Membrane with Bending Rigidity显示文摘In this paper,we analyze the stability of the Immersed Boundary Methodapplied to a membrane-fluid system with a plasma membrane immersed in an incompressibleviscous fluid.We show that for small deformations,the planar rest state isstable for a membrane with bending rigidity.The smoothed version,using a standardregularization technique for the singular force,is also shown to be stable.Furthermore,we show that the coupled fluid-membrane system is stiff and smoothing helpsto reduce the stiffness.Compared to the system of elastic fibers immersed in an incompressiblefluid,membrane with bending rigidity consist of a wider range of decayrates.Therefore numerical instability could occur more easily for an explicit methodwhen the time step size is not sufficiently small,even though the continuous problemis stable. | Zhaoxin Gong Huaxiong Huang Chuanjing Lu | 2008 | Communications in Computational Physics2008，3，3： | 2 |
| 5 | Time-dependent viscoelastic behavior of an LDPE melt显示文摘二个微分组成的方程,即 Giesekus 模型和 Johnson Segalman 模型这里被雇用预言时间依赖者 LDPE 的粘弹性的行为融化在 thixotropy 环实验和步砍率实验。多重松驰模式被采用,并且过去常在二个模型描述非线性的粘弹性的参数被适合砍变瘦粘性获得。那些上的预言短暂砍由二个模型的特征在对我们的以前的实验的质的同意被发现。Johnson Segalman 模型在 thixotropy 环和步预言摆动行为砍评估实验,而 Giesekus 模型不做。两个模型更高预言砍在砍的长时间的情况中比试验性的数据强调,暗示两个模型不能完全描绘时间依赖者砍 melt 在的应力高砍率。 | Shuxin Huang Chuanjing Lu Yurun Fan | 2006 | Acta Mechanica Sinica2006，22，3： | 1 |
| 6 | Research on the gravity effect of ventilated cavitating flows显示文摘 | Hu Shiliang Lu Chuanjing Pan Zhancheng | 2009 | Chinese Journal of Hydrodynamics2009，24，6： | 1 |
| 7 | Quadratic and cubic eddy-viscosity models in turbulent supercavitating flow computation显示文摘Quadratic and cubic non-linear eddy-viscosity turbulence models(NLEVM) with low Reynolds number(Re) correction were presented to provide better description of anisotropic turbulence stresses in the numerical prediction of supercavitating flows,which are accompanied with large density ratio and large-scaled swirling flow structures.The applications of the NLEVM were carried out through a self-developed cavitation codes,coupled with a cavitation model based on the transport equation of liquid phase.These N... | Ying Chen,~(1,a)) Chuanjing Lu,~(1,2) and Xin Chen~1 1)Department of Engineering Mechanics,School of Naval Architecture,Ocean and Civil Engineering, Shanghai Jiao Tong University,Shanghai 200240,China 2)State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China | 2011 | Theoretical & Applied Mechanics Letters2011，1，3： | 1 |
| 8 | A new semi-empirical spectrum model for complex steady shear viscosity of complex fluids显示文摘A semi-empirical spectrum model is proposed todescribe the experimental data of the steady shear propertiesof a Shengli waxy crude oil near its gel point, where sophisticatedstructural effects become apparent due to the existenceof waxy crystals in the crude oil. The model, consisting of atime spectrum, can well fit the steady shear viscosities of thewaxy crude oil over the whole experimental shear rate regionfrom 10^-4 to 10~2 s^-1.Two other experiments on complex fluidsreported recently in the literature are also well describedby this model demonstrating the applicability and accuracyof the model. | Shuxin Huang Chuanjing Lu Yurun Fan | 2009 | Acta Mechanica Sinica2009，25，6： | 0 |
| 9 | A NEW TECHNIQUE IN SOLVING UNSTEADY AND STEADY WAVEMAKING PROBLEMS显示文摘Under the’ assumption of linearization of the free-surface condition, makinguse of Green’s function method and the convolution theorem, analytic solutionsof perturbation velocity potentials which correspond to three dimensional unsteadythickness problem and lifting problem caused respectively by arbitrary motionsof a body and a hydrofoil beneath the water surface can be achieved in the closedform, In general, the whole perturbation velocity potential consists of threeterms, namely φ=φ1+φ2+φ3 , where φ1 denotes the induced velocity potential ofthe surface singularity distribution in an unbounded fluid, φ2 denotes its mirrorimage and φ3 denotes that of wave formation which includes the memory effect ofthe action of the singularity distribution. Utilizing the polynomial expansionof sin[(t-τ)] , the similarity between φ2 and φ3 is discovered and thus asimpler differential relation between them is obtained. Applying this relation,the amount of work in calculation of φ3 which is the most time-consuming one willbe reduced significantly. It is favorable not only for dealing with unsteady wave-making problems but also for solving the steady ones in virtue of evading a majordifficulty which has to be encountered during the evaluation of an improper inte-gral containing a singularity in the Green’s function. The limitation of this new technique turns out to be its slower convergenceas the Froude number is lower. | LU CHUANJING HE YOUSHENG, Shanghai Jiao Tong University, Shanghai, P.R. China | 1989 | Journal of Hydrodynamics1989，1，1： | 0 |
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