Parametric studies on pulsating heat pipe

Purpose - The purpose of this paper is to present a numerical investigation on pulsating heat pipe (PHP) to study the slug velocities as a function of various parameters.Design methodology approach - The governing equation of PHP is solved using explicit embedded Runge-Kutta method, the Dormand-Prin...

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Bibliographic Details
Published in:International journal of numerical methods for heat & fluid flow 2010-05, Vol.20 (4), p.392-415
Main Authors: Rama Narasimha, K, Sridhara, S.N, Rajagopal, M.S, Seetharamu, K.N
Format: Article
Language:English
Subjects:
Cooling
Differential equations
Displacement
Ethanol
Ethyl alcohol
Heat pipes
Heat transfer
Heat transport
Heating
High temperature
Mathematical analysis
Mathematical models
Matlab
Momentum transfer
Pipes
Product development
Pulsating flow
Slugs
Studies
Velocity
Viscosity
Working fluids
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Summary:Purpose - The purpose of this paper is to present a numerical investigation on pulsating heat pipe (PHP) to study the slug velocities as a function of various parameters.Design methodology approach - The governing equation of PHP is solved using explicit embedded Runge-Kutta method, the Dormand-Prince pair in conjunction with MATLAB with the nomenclature 45 for the determination of displacement and the velocity of the slug.Findings - The results show that lower fill ratio, higher diameter, higher operating temperature and higher temperature difference between evaporator and condenser for a given working fluid results in higher slug velocities, indicating higher momentum transfer and hence better heat transport.Research limitations implications - Under steady state conditions, the design of a PHP is facilitated through the introduction of non-dimensional numbers.Originality value - The displacement and slug velocities for additional working fluids, namely ethanol and methanol, are determined for the first time. The behaviour of non-dimensional numbers, i.e. Poiseuille number, capillary number and Eckert number in a PHP as a function of various parameters have been studied for the first time.
ISSN:0961-5539
1758-6585
DOI:10.1108/09615531011035802