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RISNumerical Study on Forced Convection Heat Transfer Across a Heated Circular Tube Based on Bingham Model With Thermally Dependent Viscosity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow and heat transfer performance of Bingham fluid with thermally dependent viscosity across a heated circular tube have been numerically investigated (2408 ≤ ReB ≤ 5852, 9 ≤ Pr ≤ 23 and 10 ≤Bn ≤ 90). The modified ...
Modeling of Active Gap Capacitance Electrical Discharge Machining
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Active gap capacitance electrical discharge machining (AGC-EDM) is a high-speed EDM method for machining polycrystalline diamond tools utilizing the active capacitive effect and powder mixing effect formed by the kerosene ...
Modeling Effective Thermal Conductivity of Thermal Radiation for Nuclear Packed Pebble Beds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In nuclear packed pebble beds, it is a fundamental task to model effective thermal conductivity (ETC) of thermal radiation. Based on the effective heat transfer cells of structured packing, a short-range radiation model ...
Particle-Scale Investigation of Thermal Radiation in Nuclear Packed Pebble Beds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For the heat transfer of pebble or granular beds (e.g., high temperature gas-cooled reactors (HTGR)), the particle thermal radiation is an important part. Using the subcell radiation model (SCM), which is a generic theoretical ...
A New Uniform Continuum Modeling of Conductive and Radiative Heat Transfer in Nuclear Pebble Bed
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Radiative and conductive heat transfer is fairly important in the nuclear pebble bed. A continuum model is proposed here to derive the effective thermal conductivity (ETC) of pebble bed. It is a physics-based equation ...
Analysis of Clumped-Pebble Shape on Thermal Radiation and Conduction in Nuclear Beds by Subcell Radiation Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The core of high-temperature gas-cooled reactor is a dense pebble bed of random packing filled with monosized fuel spheres. Subcell radiation model (SCM) is a generic analytical approach to calculate effective thermal ...
Comparative Study on the Numerical Methods for View Factor Computation for Packed Pebble Beds: Back Propagation Neural Network Methods Versus Monte Carlo Methods
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It's an unsolved problem to calculate the thermal radiation view factors among fuel pebbles as accurately and quickly as possible in the simulation of the temperature fields within the pebble-bed. In this study, a series ...
Investigation of the Influence of Elevated Pressure on Subcooled Boiling Flow—Model Evaluation Toward Generic Approach
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Modeling subcooled boiling flows in vertical channels has relied heavily on the utilization of empirical correlations for the active nucleation site density, bubble departure diameter, and bubble departure frequency. ...
Method and Validation for Measurement of Effective Thermal Diffusivity and Conductivity of Pebble Bed in High Temperature Gas-Cooled Reactors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effective thermal diffusivity and conductivity of pebble bed in the high temperature gas-cooled reactor (HTGR) are two vital parameters to determine the operating temperature and power in varisized reactors with the ...