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  • World Scientific Pub Co Pte Ltd  (5)
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  • World Scientific Pub Co Pte Ltd  (5)
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  • 1
    Online Resource
    Online Resource
    Numerical investigation on cavitation instability and flow-induced vibration of liquid rocket engine inducer
    World Scientific Pub Co Pte Ltd ; 2020
    In:  Modern Physics Letters B Vol. 34, No. 15 ( 2020-05-30), p. 2050165-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 34, No. 15 ( 2020-05-30), p. 2050165-
    Abstract: The objective of this paper is to numerically investigate the unsteady cavitating flow around a four-blade inducer, with focus on the cavitation instability and the flow-induced vibration characteristics. In the numerical simulation, the modified rotation/curvature correction turbulence model and the Zwart cavitation model are used for the simulation of the flow field. The tightly coupled algorithm is adopted for the precise prediction of the fluid-structure interaction, including the calculation of the hydrodynamic loads based on the multiphase fluid dynamics and the computation of the structural displacement via the Finite Element Method (FEM). The results showed that good agreement has been obtained between the experimental and numerical results. The fluctuation of cavity volume is the main cause of the change in the head of the inducer, and the backflow vortex cavitation has little effect on that at this flow condition. The backflow vortex cavity develops and rotates with the blades of the inducer, but with a much lower rotational velocity than that of the blades. The flow-induced vibration of the inducer caused by the unsteady cavitating flow mainly manifests as a first-order bending mode. The backflow vortex cavitation has a significant impact on the vibration of both the blades and the guide-water cone. Besides, a cavitation auto-oscillation at the inlet of the inducer has also been detected based on the phase correlation analysis.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984920501651
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2020
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  • 2
    Online Resource
    Online Resource
    Stable large-area monodomain in as-grown bulk ferroelectric single crystal Sn 2 P 2 S 6
    World Scientific Pub Co Pte Ltd ; 2023
    In:  Journal of Advanced Dielectrics Vol. 13, No. 03 ( 2023-06)
    Details
    In: Journal of Advanced Dielectrics, World Scientific Pub Co Pte Ltd, Vol. 13, No. 03 ( 2023-06)
    Abstract: Driven by the minimization of total energy, the multi-domain morphology is preferred in as-grown ferroelectrics to reduce the depolarization and strain energy during the paraelectric to ferroelectric phase transition. However, the complicated multi-domain is not desirable for certain high-performance ferroelectric electro-optic devices. In this work, we achieve a reproducible and stable large-area monodomain in as-grown bulk ferroelectric single crystal [Formula: see text]. The monodomain dominates the entire single crystal, which is attributed to the internal charge carriers from the photoexcited disproportionation reaction of Sn ions. The charge carriers effectively screen the depolarization field and therefore decrease the depolarization energy and facilitate the formation of monodomain. This work offers a potential approach for engineering bulk ferroelectrics with a stable monodomain, which is desirable for the high-performance ferroelectric electro-optic devices.
    Type of Medium: Online Resource
    ISSN: 2010-135X , 2010-1368
    URL: Article
    DOI: 10.1142/S2010135X22430019
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2023
    detail.hit.zdb_id: 2756564-6
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  • 3
    Online Resource
    Online Resource
    Mathematical modeling of drug resistance in heterogeneous cancer cell populations
    World Scientific Pub Co Pte Ltd ; 2023
    In:  International Journal of Biomathematics
    Details
    In: International Journal of Biomathematics, World Scientific Pub Co Pte Ltd
    Type of Medium: Online Resource
    ISSN: 1793-5245 , 1793-7159
    URL: Article
    DOI: 10.1142/S1793524523501012
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2023
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  • 4
    Online Resource
    Online Resource
    Hopf bifurcation of a delay SIRS epidemic model with novel nonlinear incidence: Application to scarlet fever
    World Scientific Pub Co Pte Ltd ; 2018
    In:  International Journal of Biomathematics Vol. 11, No. 07 ( 2018-10), p. 1850091-
    Details
    In: International Journal of Biomathematics, World Scientific Pub Co Pte Ltd, Vol. 11, No. 07 ( 2018-10), p. 1850091-
    Abstract: An [Formula: see text] epidemic model incorporating incubation time delay and novel nonlinear incidence is proposed and analyzed to seek for the control strategies of scarlet fever, where the contact rate which can reflect the regular behavior and habit changes of children is non-monotonic with respect to the number of susceptible. The model without delay may exhibit backward bifurcation and bistable states even though the basic reproduction number is less than unit. Furthermore, we derive the conditions for occurrence of Hopf bifurcation when the time delay is considered as a bifurcation parameter. The data of scarlet fever of China are simulated to verify our theoretical results. In the end, several effective preventive and intervention measures of scarlet fever are found out.
    Type of Medium: Online Resource
    ISSN: 1793-5245 , 1793-7159
    URL: Article
    DOI: 10.1142/S1793524518500912
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2018
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  • 5
    Online Resource
    Online Resource
    Global dynamics analysis for a nonlinear HTLV-I model with logistic proliferation and CTL response
    World Scientific Pub Co Pte Ltd ; 2023
    In:  International Journal of Biomathematics
    Details
    In: International Journal of Biomathematics, World Scientific Pub Co Pte Ltd
    Abstract: It is beyond dispute that cytotoxic T-lymphocytes (CTLs) exert a vital function in the host’s antiviral defense mechanism. With the idea of the above factor and the logistic proliferation of CD4[Formula: see text] T-cells, we establish a HTLV-I (human T-cell leukemia virus type-I) mathematical model. First, two threshold parameters [Formula: see text] and [Formula: see text] (the basic reproduction numbers for viral infection and CTL immune response, respectively) are obtained. Second, sufficient criteria for local and global asymptotic stabilities of the feasible equilibria of the model are deduced, respectively. Third, the sensitivity analyses of [Formula: see text] and [Formula: see text] are performed to better understand the effective strategies for HTLV-I infection. Finally, not only numerical simulations are given to illustrate the stability conclusions, but also the biological significance is stated.
    Type of Medium: Online Resource
    ISSN: 1793-5245 , 1793-7159
    URL: Article
    DOI: 10.1142/S1793524523500237
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2023
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