Abstract
The foam flow phenomen on the forced convec-tion, even with laminar flow, is complex and hard to de-velop analytically. Only key to the problem is experimental results and numerical solution. Heat transfer coefficient ‘h’ is very important parameter because it determines the rate of heat transfer. This paper uses two methods to determine this parameter, experiment and CFD simulation. Experiment was made for transient-turbulent convective heat transfer of macro foam in vertical cylindrical tube. CFD simulation in CFX was made and the experimental results have proven to be very useful for the validation of CFD calculations of foam flow through a heated cylindrical tube.After the numerical simulation proved the exper-imental results, RBMK-1500 control and protection chan-nel cooling with macro foam was modeled. While all of the reactors (installed in Ignalina NPP) have been already closed, but are still 11 operational reactors with similar in design.DOI: http://dx.doi.org/10.5755/j01.mech.20.5.7165
Highlights
The foam flow phenomen on the forced convection, even with laminar flow, is complex and hard to develop analytically
CFD simulation in CFX was made and the experimental results have proven to be very useful for the validation of CFD calculations of foam flow through a heated cylindrical tube
Using ANSYS CFX 14.5 software package it was composed numerical model of two-phase macro foam flow in a vertical cylindrical channel where inner channel wall transfers the heat to the upward foam flow
Summary
The foam flow phenomen on the forced convection, even with laminar flow, is complex and hard to develop analytically. This paper uses two methods to determine this parameter: experiment and CFD (computational fluid dynamics) simulation. Experiment was made for transientturbulent convective heat transfer of macro foam in vertical cylindrical tube. CFD simulation in CFX was made and the experimental results have proven to be very useful for the validation of CFD calculations of foam flow through a heated cylindrical tube. After the numerical simulation proved the experimental results, RBMK-1500 control and protection channel cooling with macro foam was modeled. ANSYS CFX software is a general purpose fluid dynamics simulation program has been developed over more than 20 years and is widely used in solving complex two-phase flow situations. The foam flow and heat transfer were simulated by using ANSYS CFX 14.5 software package
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