The Experts below are selected from a list of 1341 Experts worldwide ranked by ideXlab platform

Zhuoqing An - One of the best experts on this subject based on the ideXlab platform.

  • correlating the apparent viscosity with gas solid suspension flow in Straight Pipelines
    Powder Technology, 2019
    Co-Authors: Zhuoqing An
    Abstract:

    Abstract The apparent viscosity of dilute solids suspension flows has been inferred from the experimentally measured frictional pressure drop in a specially designed downflow Straight Pipeline. The results indicate that the apparent viscosity of gas-solid suspension flow increases with the increment of the solids holdup, and is, in the transition region only, inversely proportional to the gas velocity. As the influence of gas velocity to the gas-solid suspension flow becomes negligible in the turbulent region, the apparent viscosity can be linearly correlated with the solids holdup. New correlations for the apparent viscosity of the gas-solid suspension flow in Straight Pipelines were proposed.

Yasuyuki Takata - One of the best experts on this subject based on the ideXlab platform.

  • prediction of transient temperature of hydrogen flowing from pre cooler of refueling station to inlet of vehicle tank
    International Journal of Hydrogen Energy, 2018
    Co-Authors: Torato Kuroki, Naoya Sakoda, Kanei Shinzato, Masanori Monde, Yasuyuki Takata
    Abstract:

    Abstract A thermodynamic analytical approach is proposed to obtain the transient temperature rise of hydrogen when pre-cooled hydrogen is heated through filling equipment at a refueling station. In this approach, the filling equipment is assumed to be a simple and Straight Pipeline, and the heat balance based on the thermodynamics for hydrogen flowing in the Pipeline is analyzed. The internal surface temperature of the Pipeline wall is required to calculate the heat flux into hydrogen. Therefore, we propose a solution to obtain the temperature distribution in the Pipeline wall when hydrogen with lower temperature than the Pipeline flows unsteadily. Based on the proposed solution, we calculate the heat flux and acquire the hydrogen temperature. The hydrogen temperatures predicted by this approach are compared with experimental data for the temperature rise of hydrogen heated through actual filling equipment, and a good agreement is shown. Thus, we show that this approach is useful for simulating the temperature rise of hydrogen flowing in the filling equipment.

Lung-jieh Yang - One of the best experts on this subject based on the ideXlab platform.

  • Buckled-type valves integrated by parylene micro-tubes☆
    Sensors and Actuators A-physical, 2006
    Co-Authors: Lung-jieh Yang, Hsin-hsiung Wang, Jiun-min Wang, Kuan-chun Liu
    Abstract:

    Abstract This paper demonstrates a newly developed parylene buckled-type valve with the same working principle of the “buckled straw”. Such a new design of the valve uses the buckled region of plastic tubes as the on/off switch for flow control, and there is no need of adding deformable diaphragms or sealing parts into the valve device. By the merit of its concise mechanism, i.e., a Straight Pipeline with the region for buckling, the buckled-type valve intrinsically operates with almost zero dead volume. The fabrication sequence of this new valve combines the techniques of sacrificial mould of capillary glass tubes, conformal parylene coating and SU-8 photolithography. A valve device of 1 cm long, 0.8 cm wide and with the buckled micro-tube of 390 μm outer-diameter is demonstrated. The turn-on (flow-closing) angle of this valve verified as 120° experimentally.

  • Buckled-type valves integrated by parylene micro-tubes
    The 13th International Conference on Solid-State Sensors Actuators and Microsystems 2005. Digest of Technical Papers. TRANSDUCERS '05., 2005
    Co-Authors: Jiun-min Wang, Lung-jieh Yang, Kai-chung Ko, Wen-pin Shih
    Abstract:

    This paper demonstrates a newly developed parylene buckled-type valve with the same working principle of the "buckled straw". Such a new design of valves uses the buckled region of plastic tubes as the on/off switch for flow control, and there is no need of adding deformable diaphragms or sealing parts into the valve device. By the merit of its concise mechanism, i.e., a Straight Pipeline with the region for buckling, the buckled-type valve intrinsically operates with almost zero dead volume. The fabrication sequence of this new valve combines the techniques of sacrificial mould of capillary glass tubes, conformal coating of parylene and SU-8 photolithography. A valve device of 1cm long, 0.8cm wide and with the buckled micro-tube of 350 /spl mu/m diameter is demonstrated. The turn-on angle of this valve verified as 135/spl deg/ experimentally.

  • The Parylene Bowed-Type Valves
    2005
    Co-Authors: Hsin-hsiung Wang, Kuan-chun Liu, Lung-jieh Yang
    Abstract:

    This paper demonstrates a newly developed parylene bowed-type valve with the same working principle of the “buckled straw”. Such a new design of the valve uses the buckled region of plastic tubes as the on/off switch for flow control, and there is no need of adding deformable diaphragms or sealing parts into the valve device. By the merit of its concise mechanism, i.e., a Straight Pipeline with the region for buckling, the bowed-type valve intrinsically operates with almost zero dead volume. The fabrication sequence of this new valve combines the techniques of sacrificial mould of capillary glass tubes, conformal coating of parylene and SU-8 photolithography. A valve device of 1 cm long, 0.8 cm wide is demonstrated, and the turn-on angle of this valve verified as 135 experimentally.

Slawomi Henclik - One of the best experts on this subject based on the ideXlab platform.

  • numerical modeling of water hammer with fluid structure interaction in a Pipeline with viscoelastic supports
    Journal of Fluids and Structures, 2018
    Co-Authors: Slawomi Henclik
    Abstract:

    Abstract In the paper a numerical approach to the four equation model of water hammer (WH) with fluid–structure interaction (FSI) is presented. An algorithm for numerical solution of that model in time domain based on the method of characteristics (MOC) is proposed. Special attention is paid to modeling of the influence of viscoelastic pipe supports. The boundary condition at the support is formulated as a differential equation of junction motion which is solved numerically concurrently with the MOC compatibility equations. Numerical simulations were done with the use of an own computer program. The tests were conducted for a model of real Pipeline built in the lab and fastened with specific, complex, supporting system. The numerical results were compared to the experimental records and after some modeling and calibration quite a good agreement was achieved. Basic behaviors in the pressure records were identified and existed discrepancies were discussed and explained. The other physical model tested and preliminary analyzed in the paper is a Straight Pipeline fixed to the floor only with viscoelastic supports. Such a design created the possibility of significant displacements of the Pipeline on the supports and thus allowing for effective testing of the influence of supports stiffness and damping properties on the WH behaviors. The specific initial conditions for that case were formulated, solved and implemented in a computer code. It was found that proper selection of support parameters may produce significant reduction of WH pressure amplitudes, mainly due to effective energy absorption and dissipation at the supports.

Kuan-chun Liu - One of the best experts on this subject based on the ideXlab platform.

  • Buckled-type valves integrated by parylene micro-tubes☆
    Sensors and Actuators A-physical, 2006
    Co-Authors: Lung-jieh Yang, Hsin-hsiung Wang, Jiun-min Wang, Kuan-chun Liu
    Abstract:

    Abstract This paper demonstrates a newly developed parylene buckled-type valve with the same working principle of the “buckled straw”. Such a new design of the valve uses the buckled region of plastic tubes as the on/off switch for flow control, and there is no need of adding deformable diaphragms or sealing parts into the valve device. By the merit of its concise mechanism, i.e., a Straight Pipeline with the region for buckling, the buckled-type valve intrinsically operates with almost zero dead volume. The fabrication sequence of this new valve combines the techniques of sacrificial mould of capillary glass tubes, conformal parylene coating and SU-8 photolithography. A valve device of 1 cm long, 0.8 cm wide and with the buckled micro-tube of 390 μm outer-diameter is demonstrated. The turn-on (flow-closing) angle of this valve verified as 120° experimentally.

  • The Parylene Bowed-Type Valves
    2005
    Co-Authors: Hsin-hsiung Wang, Kuan-chun Liu, Lung-jieh Yang
    Abstract:

    This paper demonstrates a newly developed parylene bowed-type valve with the same working principle of the “buckled straw”. Such a new design of the valve uses the buckled region of plastic tubes as the on/off switch for flow control, and there is no need of adding deformable diaphragms or sealing parts into the valve device. By the merit of its concise mechanism, i.e., a Straight Pipeline with the region for buckling, the bowed-type valve intrinsically operates with almost zero dead volume. The fabrication sequence of this new valve combines the techniques of sacrificial mould of capillary glass tubes, conformal coating of parylene and SU-8 photolithography. A valve device of 1 cm long, 0.8 cm wide is demonstrated, and the turn-on angle of this valve verified as 135 experimentally.