Application of the heat balance for estimating the hydrogen dissociation rate constant on the tantalum surface

被引：0
作者：
M. Yu. Plotnikov
E. V. Shkarupa
机构：
[1] Kutateladze Institute of Thermophysics SB RAS,
[2] Institute of Computational Mathematics and Mathematical Geophysics SB RAS,undefined
来源：
Thermophysics and Aeromechanics | 2021年 / 28卷
关键词：
Direct Simulation Monte Carlo simulation; atomic hydrogen; heterogeneous reactions;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Heat transfer between the surface of a heated wire and ambient gas within the framework of the two-step mechanism of heterogeneous dissociation of hydrogen is studied by the Direct Simulation Monte Carlo method. This mechanism includes four heterogeneous reactions and takes into account the occupancy of activation sites on the surface. Based on the heat balance analysis performed, a dissociation rate constant is proposed, which yields the values of the power spent on gas heating and heterogeneous reactions that coincide with experimental data. The influence of the dissociation rate constant on the occupancy of surface sites and also on the probabilities of dissociation, recombination, and adsorption due to particle-surface collisions is analyzed.
引用
收藏
页码：555 / 562
页数：7
相关论文
共 41 条
[1]  
May PW(2000)Diamond thin films: a 21st-century material Philos. Trans. Roy. Soc. London, Ser. A 358 473-495
[2]  
Rebrov AK(2017)Possibilities of gas phase synthesis of diamond structures from mixtures of hydrogen and hydrocarbons Phys. Usp. 60 179-186
[3]  
Langmuir I(1914)The dissociation of hydrogen into atoms. P. I. Experimental J. Am. Chem. Soc. 36 1708-1722
[4]  
Mackay GMJ(2019)Thermal model-based determination of dissociation degree of hydrogen flowing in a hot tube Interfacial Phenomena and Heat Transfer 7 139-149
[5]  
Morozov AA(2016)Heterogeneous physical and chemical processes in a rarefied-gas flow in a channel Dokl. Phys. 61 223-226
[6]  
B’yadovskiy TT(1962)Reflection and dissociation of H2 on tungsten J. Chem. Phys. 37 898-904
[7]  
Kubrak KV(2016)Heterogeneous activation of rarefied hydrogen in thin tubes Vacuum 129 31-37
[8]  
Plotnikov MY(1975)Intense atomic-hydrogen beam source Rev. Sci. Instr. 46 536-537
[9]  
Yudin IB(2018)Hydrogen dissociation in rarefied gas flow through a wire obstacle J. Appl. Mech. Tech. Phys. 59 794-800
[10]  
Rebrov AK(2018)Analysis of flows by deposition of diamond-like structures Phys. Fluids 30 16106-1-16106-11
12345