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  • Open Access

    ABSTRACT

    Assessment of Some Atomization Models Used in Spray Calculations

    M.S. Raju & Dan Bulzan

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.19, No.4, pp. 109-110, 2011, DOI:10.3970/icces.2011.019.109

    Abstract The paper presents the results from a validation study undertaken as a part of the NASA's fundamental aeronautics initiative on high altitude emissions in order to assess the accuracy of several atomization models used in both sub-cooled and superheat spray calculations. As a part of this investigation we have undertaken the validation based on four different cases to investigate the spray charactereristics of (1) a ashing jet generated by the sudden release of pressurized R134A from cylindrical nozzle, (2) a liquid jet atomizing in a subsonic cross ow, (3) a Parker-Hannin pressure swirl atomizer, and More >

  • Open Access

    ABSTRACT

    Investigation on the Singularities of Some Singular integrals

    Zai You YAN

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 77-78, 2011, DOI:10.3970/icces.2011.017.077

    Abstract In the boundary element method, treatment of all the possible singular integrals is very important for the correctness and accuracy of the solutions. Generally, the directional derivative of a weakly singular integral is computed by an integral in the sense of Cauchy principle value if the directional derivative of the weakly singular integral kernel is strongly singular or in the sense of Hadamard finite part integral if the the directional derivative of the weakly singular integral kernel is hypersingular. We will try to discover how the strongly singular and hypersingular integrals are generated and propose… More >

  • Open Access

    ABSTRACT

    Fringe pattern analysis: some results and discussions

    Qian Kemao

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.1, pp. 19-20, 2011, DOI:10.3970/icces.2011.018.019

    Abstract When a fringe pattern is obtained, it needs to be analyzed in order to extract the desired information. In this talk, we are going to introduce some fringe pattern analysis techniques that we proposed recently, such as windowed Fourier transform (WFT) [1], coherence enhancing diffusion (CED) [2], and frequency-guided sequential demodulation (FSD) [3]. Some results, along with discussions, are given for the following cases:
    1. Filtering one fringe pattern
    2. Phase retrieval from one closed fringe pattern
    3. Phase retrieval from one carrier fringe pattern
    4. Phase shift retrieval from two fringe patterns
    5. Phase retrieval from a More >

  • Open Access

    ABSTRACT

    Experimental Study on Zonal Disintegration of some kinds of Layered Similar Material Model

    ZHANG Zhi-hui, WANG Xue-bin, PAN Yi-shan

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 99-100, 2011, DOI:10.3970/icces.2011.016.099

    Abstract It is known from experimental studies that a zonal periodic structure in the form of alternated regions of fractured and relatively intact rock appears around rock workings. It is impossible to describe the occurrence of such a structure on the basis of the classical continuum model, so it attracted the research's wide attention. In order to know the crack distribution and its change along the axial direction, and this phenomenon may take place in which kinds of material, four kinds of layered similar materials blocks are used to establish a barrel model. The crack distribution More >

  • Open Access

    ARTICLE

    Some Fundamental Properties of Lattice Boltzmann Equation for Two Phase Flows

    Qin Lou1, Zhaoli Guo1,2, Chuguang Zheng1

    CMES-Computer Modeling in Engineering & Sciences, Vol.76, No.3&4, pp. 175-188, 2011, DOI:10.3970/cmes.2011.076.175

    Abstract Due to the mesoscopic and kinetic nature, the lattice Boltzmann equation (LBE) method has become an efficient and powerful tool for modeling and simulating interfacial dynamics of multi-phase flows. In this work we discuss several fundamental properties of two-phase LBE models. Particularly, the effects of force discretization, spurious currents in the vicinity of interfaces, and checkerboard effects with the underlying lattices, are investigated. More >

  • Open Access

    ARTICLE

    Investigation on the Singularities of Some Singular Integrals

    Zai You Yan1, Qiang Zhang1

    CMES-Computer Modeling in Engineering & Sciences, Vol.75, No.3&4, pp. 205-222, 2011, DOI:10.3970/cmes.2011.075.205

    Abstract In a boundary element method, the treatment of all the possible singular integrals is very important for the correctness and accuracy of the solutions. Generally, the directional derivative of a weakly singular integral is computed by an integral in the sense of Cauchy principal value if the directional derivative of the weakly singular integral kernel is strongly singular or in the sense of Hadamard finite part integral if it is hypersingular. In this paper, we try to discover how the strongly singular and hypersingular integrals are generated and propose an idea to avoid the appearance More >

  • Open Access

    ARTICLE

    Higher-Order Green's Function Derivatives and BEM Evaluation of Stresses at Interior Points in a 3D Generally Anisotropic Solid

    Y.C. Shiah1, C. L. Tan2

    CMES-Computer Modeling in Engineering & Sciences, Vol.78, No.2, pp. 95-108, 2011, DOI:10.3970/cmes.2011.078.095

    Abstract By differentiating the Green function of Ting and Lee (1997) for 3D general anisotropic elastotatics in a spherical coordinate system as an intermediate step, and then using the chain rule, derivatives of up to the second order of this fundamental solution are obtained in exact, explicit, algebraic forms. No tensors of order higher than two are present in these derivatives, thereby allowing these quantities to be numerically evaluated quite expeditiously. These derivatives are required for the computation of the internal point displacements and stresses via Somigliana's identity in BEM analysis. Some examples are presented to More >

  • Open Access

    ARTICLE

    Antiproliferative and genotoxic effects of Mikania glomerata (Asteraceae)

    GRACIELI DALLA NORA1, TAMARA PASTORI1, HAYWOOD DAIL LAUGHINGHOUSE IV2,3, THAIS SCOTTI DO CANTO-DOROW1, SOLANGE BOSIO TEDESCO1*

    BIOCELL, Vol.34, No.3, pp. 95-102, 2010, DOI:10.32604/biocell.2010.34.095

    Abstract Mikania glomerata is a plant used in Brazilian traditional medicine, known as ‘guaco’. It possesses anti-inflammatory properties and the aqueous extracts of its leaves are indicated for the treatment of diseases of the respiratory tract. This study aimed at evaluating the antiproliferative and genotoxic effect of Mikania glomerata leaf infusions on the cell cycle of onion. The material used was collected in the native environment from Rio Grande do Sul State, Brazil. Aqueous extracts through infusions were prepared in two concentrations: 4g/L (usual concentration) and 16g/L (4x more concentrated) of each of the populations. Two groups of… More >

  • Open Access

    ARTICLE

    Effect of morphological heterogeneity of somatic embryos of Melia azedarach on conversion into plants

    SILVIA VILA, ANA GONZALEZ, HEBE REY AND LUIS MROGINSKI*

    BIOCELL, Vol.34, No.1, pp. 7-14, 2010, DOI:10.32604/biocell.2010.34.007

    Abstract Embryogenic cultures were initiated from immature Melia azedarach (Meliaceae) zigotic embryos. Explants were induced on Murashige and Skoog (1962) medium with 4.54 μM thidiazuron or 0.45 μM dichlorophenoxyacetic acid. After 6 weeks of culture on induction medium, somatic embryos were categorized in four morphological classes based on the presence of single or fused embryos and if they remained united or not to the original explant; that were evaluated histologically. The somatic embryos of every category were transferred, in groups or individually, on a 1/4 MS medium. Bipolar embryos, the more typically normal ones, had well defined More >

  • Open Access

    ARTICLE

    Simulation and Modeling of Laser-Tissue Interactions Based on a Liposome-Dye System

    F.E. Mensah∗,†, R. Sridhar, P. Misra

    Molecular & Cellular Biomechanics, Vol.7, No.4, pp. 203-212, 2010, DOI:10.3970/mcb.2010.007.203

    Abstract This work presents an overview of the use of liposomes for targeted delivery of photosensitizers to tumors for Photodynamic Therapy (PDT). It assesses the results of a quantitative model to explain the interaction of short-pulsed lasers (in the nanosecond and picosecond domains) with a liposome-dye complex in terms of a localized photo-induced thermal mechanism. Incorporation of an organic dye (sulforhodamine) within lipid vesicles has been investigated in conjunction with the effect of laser irradiation on the integrity of the liposome-dye complex. The variation of the absorption coefficient as a function of wavelength for dye-encapsulated liposomes More >

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