Experimental And Numerical Investigation Of
Boiling Flow In A Vertical Pipe With Phase
Change Using A Multi-fluid Modelling Approach
Author(s)
R. Kopun & L. Škerget
Abstract
Multi-phase boiling flow inside a vertical pipe is simulated as part of a
preliminary study of the heat transfer characteristics of coolant flow inside water
cooling jackets in IC engines. Based on increasing demands for higher efficiency
inside the engine cooling block, heat transfer plays an important role in a
conceptual and thermal analysis used to provide efficient cooling. The
simulations of thermal and flow phase change characteristics inside a vertical
pipe boiling system were made to prevent component failure and to create a
uniform temperature distribution inside the water cooling jacket. The developed
boiling mass transfer model, such as the BDL (Boiling Departure Lift-off)
model, has empirically correlated heat transfer coefficients and is implemented
within the commercial computational fluid dynamics code AVL FIRE®.
Governing equations are based on the Eulerian multi-fluid approach which treats
each phase as interpenetrating continua coexisting in the flow domain, with
inter-phase transfer terms accounting for phase interactions. Turbulence is
modelled by using an advanced - - model. In this paper, we focus on
comparison and suitability of the mentioned boiling model with two different
boundary condition approaches to determine the HTC (heat transfer coefficient)
for multi-phase boiling flow inside the vertical pipe. Temperature measurements
along the height of the pipe were performed at three different positions.
Comparison with the available experimental data for different boundary
conditions is presented. Simulation results exhibit good agreement with the
experimental data.
Keywords: multiphase flow, boiling, vertical pipe, HTC, CFD, IC engines.
Keywords
multiphase flow, boiling, vertical pipe, HTC, CFD, IC engines.
Related Book
Other papers in this volume
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