In this paper, impinging jets in porous medium and the lower wall heated at uniform heat flux is studied experimentally and numerically. In this paper a numerical investigation on impinging jets in metal foam by considering air as fluid is described. A two-dimensional model is developed by means of the FLUENT code. Different Reynolds numbers and Rayleigh numbers are considered. The domain is made of a principal channel and two adiabatic walls, one upstream the principal channel and the other downstream. The target surface is heated by a constant heat flux equal to 500 W/m2 and 1000 W/m2. The heated surface is 100 mm long, the distance between two adiabatic walls is 20 mm. Metal foam of 10 PPI is considered. The experimental apparatus is made up of a fun systems, a test section, a tube. The tube is long 1000 mm and diameter of 12 mm. The test section has a diameter of 100 mm and thickness equal to 10, 20 and 40 mm. In the test section the lower plate is in aluminum and is heated by an electrical resistances whereas the upper plate is in plexiglass. Results in terms of wall temperature profiles, local and average Nusselt numbers are presented for different values of Reynolds number, Richardson number, pressure drop and friction factor. Besides some preliminary results indicate that the EPR (Evaluation Performance Ratio) values are promising though comparison to the existing data in literature should be accomplished to validated the present investigation. Some comparison between experimental and numerical results are accomplished.
A numerical and experimental analysis on confined impinging round jets in porous media / Buonomo, B.; Cirillo, L.; Manca, O.; Nardini, S.. - (2017), pp. 789-802. (Intervento presentato al convegno CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer tenutosi a Napoli, Itakly nel May) [10.1615/ichmt.2017.cht-7.820].
A numerical and experimental analysis on confined impinging round jets in porous media
Cirillo L.Writing – Original Draft Preparation
;
2017
Abstract
In this paper, impinging jets in porous medium and the lower wall heated at uniform heat flux is studied experimentally and numerically. In this paper a numerical investigation on impinging jets in metal foam by considering air as fluid is described. A two-dimensional model is developed by means of the FLUENT code. Different Reynolds numbers and Rayleigh numbers are considered. The domain is made of a principal channel and two adiabatic walls, one upstream the principal channel and the other downstream. The target surface is heated by a constant heat flux equal to 500 W/m2 and 1000 W/m2. The heated surface is 100 mm long, the distance between two adiabatic walls is 20 mm. Metal foam of 10 PPI is considered. The experimental apparatus is made up of a fun systems, a test section, a tube. The tube is long 1000 mm and diameter of 12 mm. The test section has a diameter of 100 mm and thickness equal to 10, 20 and 40 mm. In the test section the lower plate is in aluminum and is heated by an electrical resistances whereas the upper plate is in plexiglass. Results in terms of wall temperature profiles, local and average Nusselt numbers are presented for different values of Reynolds number, Richardson number, pressure drop and friction factor. Besides some preliminary results indicate that the EPR (Evaluation Performance Ratio) values are promising though comparison to the existing data in literature should be accomplished to validated the present investigation. Some comparison between experimental and numerical results are accomplished.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
