Simplified Numerical Study of Evaporation Processes Inside Vertical Tubes

• 作 者: Pawe Ocoń Marzena Nowak Stanisaw Lopata
• 机 构: Cracow University of Technology,Faculty of Mechanical Engineering,Institute of Thermal Power Enginee
• 出 处: Journal of Thermal Science
• 发表日期: 2014年02期
• 关键词: evaporation simplified calculating enthalpy length boiling frictional inlet Frie

The paper presents a simplified numerical model of evaporation processes inside vertical tubes.In this model only the temperature fields in the fluid domain(the liquid or two-phase mixture) and solid domain(a tube wall) are determined.Therefore its performance and efficiency is high.The analytical formulas,which allow calculating the pressure drop and the distribution of heat transfer coefficient along the tube length,are used in this model.The energy equation for the fluid domain is solved with the Control Volume Method and for the solid domain with the Finite Element Method in order to determine the temperature field for the fluid and solid domains.

The paper presents a simplified numerical model of evaporation processes inside vertical tubes. This model only the temperature fields in the fluid domain (the liquid or two-phase mixture) and solid domain (a tube wall) are determined. Wherefore its performance and efficiency is high. The analytical formulas, which allow calculating the pressure drop and the distribution of heat transfer coefficient along the tube length, are used in this model. energy equation for the fluid domain is solved with the Control Volume Method and for the solid domain with the Finite Element Method in order to determine the temperature field for the fluid and solid domains.