Effect of tube wall thickness on the confinement loss, power fraction and bandwidth of terahertz negative curvature fibers
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DOI: 10.1016/j.ijleo.2018.10.067
Abstract: Abstract We treat numerical simulations to investigate how the tube wall thickness affects the confinement loss, power fraction ratio and bandwidth of terahertz (THz) negative curvature fibers at the frequency of 2.52 THz. The frequency of… read more here.
Keywords: confinement loss; negative curvature; tube wall; curvature fibers ... See more keywords
Thermophoresis of a spherical particle in a microtube
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DOI: 10.1016/j.jaerosci.2017.07.017
Abstract: Abstract A theoretical study is presented for the axially symmetric thermophoresis of a spherical particle in a microtube filled with a gaseous medium. The uniformly applied temperature gradient is tangential to the tube wall, which… read more here.
Keywords: tube wall; particle; thermophoresis spherical;
Temperature of the Core Tube Wall during Coring in Coal Seam: Experiment and Modeling
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DOI: 10.1021/acsomega.1c06746
Abstract: Temperature is the primary factor affecting the law of coal gas desorption. When the core method is used to measure the coal seam gas content (CSGC), the temperature of the coal core sample (CCS) will… read more here.
Keywords: core tube; core; coal; temperature ... See more keywords
Fouling in a Steam Cracker Convection Section Part 1: A Hybrid CFD-1D Model to Obtain Accurate Tube Wall Temperature Profiles
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DOI: 10.1080/01457632.2018.1522081
Abstract: Abstract To study fouling in steam cracker convection section tubes, accurate tube wall temperature profiles are needed. In this work, tube wall temperature profiles are calculated using a hybrid model, combining a one-dimensional (1D) process… read more here.
Keywords: tube; tube wall; gas side; wall temperature ... See more keywords
Computational Fluid Dynamics Simulations of Gas-Phase Radial Dispersion in Fixed Beds with Wall Effects
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DOI: 10.3390/fluids2040056
Abstract: The effective medium approach to radial fixed bed dispersion models, in which radial dispersion of mass is superimposed on axial plug flow, is based on a constant effective dispersion coefficient, DT. For packed beds of… read more here.
Keywords: tube wall; concentration profiles; wall; dispersion ... See more keywords