Numerical Simulation of Steam Condensation Flow and Liquid Film Characteristics in Tubes Based on Euler Wall Liquid Film Model
A three-dimensional mathematical model of steam condensation flow in a smooth tube based on Euler's liquid film model was established by using ANSYS FLUENT software.The simu-lated pipe is 500 mm in length and 38 mm in diameter.Under simulated conditions,the saturation temperature of inlet steam is 70℃,the total heat transfer temperature difference is 5℃ and 7℃,and the inlet steam speed is 14～20 m/s.The simulation results show that the liquid film thickness increases with the increase of the flow distance at the bottom of the pipe,and the liquid film thick-ness increases first and then becomes stable at the top of the pipe.The larger steam inlet velocity produces higher liquid film thickness.The liquid film flow velocity increases with the increase of the flow distance at the bottom of the pipe,and the liquid film flow velocity increases first and then slowly decreases at the top of the pipe.A larger steam inlet velocity produces a higher liquid film flow velocity.
numerical simulationcondensationliquid filmEulerian wall film
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