Simulations, Analysis and Thermoeconomical Synthesis of Heat Transfer Elements

2001 ◽  
Author(s):  
L. Reznikov ◽  
T. Morosuk
Keyword(s):  
Heat Transfer ◽  
Temperature Fields ◽  
Design Parameters ◽  
Key Factors ◽  
Analysis And Design ◽  
Experimental Heat ◽  
Experimental Heat Transfer ◽  
Analysis And Synthesis ◽  
Selection Of ◽  
Unified Method

Abstract Problems of analysis and design of intricate heat transfer elements are traditional for various industrial and experimental heat transfer units, including multichannel heat exchangers and multi-component fins. Authors suggest and introduce unified method of analysis and synthesis for these classes of heat transfer objects. Authors’ method of simulations for such class of objects is based on step-by-step integration of local tangential and longitudinal heat flows with sequential computations of temperature fields in cycles of iterations and specific selection of boundary conditions. Variations of selected key factors provide arrays of design parameters for synthesis of new and optimized heat transfer objects.

Laminar Combined Convection From a Rotating Cone

1963 ◽  
Vol 85 (1) ◽  
pp. 29-34 ◽  
Author(s):  
R. G. Hering ◽  
R. J. Grosh
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Free Convection ◽  
Numerical Solutions ◽  
Temperature Fields ◽  
Boundary Layer Equations ◽  
Experimental Heat ◽  
Experimental Heat Transfer ◽  
Cone Apex ◽  
Rotating Cone

The effect of free convection on heat transfer and on the flow field about a rotating cone is studied. A similar solution for the laminar boundary-layer equations is found to exist when the cone surface temperature varies linearly with distance from the cone apex. The transformed boundary-layer equations contain the important parameter Gr/Re2. This parameter determines the relative importance of the free convection motions on forced convection. Numerical solutions of the transformed equations for aiding flows have been carried out for Prandtl number 0.7 and different values of Gr/Re2. Results are reported for the heat transfer, shear stress, shaft moment, and velocity and temperature fields. Criteria are given for subdividing the regimes of flow as purely free, purely forced, and combined flow. Preliminary experimental heat-transfer results are reported which indicate the trends predicted by theory.

scholarly journals Experimental heat transfer evaluation in a porous media

2021 ◽  
Vol 1868 (1) ◽  
pp. 012016
Author(s):  
S Pedrazzi ◽  
G Allesina ◽  
M Puglia ◽  
N Morselli ◽  
F Ottani ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Experimental Heat ◽  
Experimental Heat Transfer

Heat Transfer Performance of Aluminum Foams

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Simone Mancin ◽  
Claudio Zilio ◽  
Luisa Rossetto ◽  
Alberto Cavallini
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Pressure Drop ◽  
Fluid Dynamic ◽  
Foam Core ◽  
Aluminum Foams ◽  
Experimental Heat ◽  
High Heat Transfer ◽  
Experimental Heat Transfer ◽  
Core Height

Because of their interesting heat transfer and mechanical properties, metal foams have been proposed for several different applications, thermal and structural. This paper aims at pointing out the effective thermal fluid dynamic behavior of these new enhanced surfaces, which present high heat transfer area per unit of volume at the expense of high pressure drop. The paper presents the experimental heat transfer and pressure drop measurements relative to air flowing in forced convection through four different aluminum foams, when electrically heated. The tested aluminum foams present 5, 10, 20 and 40 PPI (pores per inch), porosity around 0.92–0.93, and 0.02 m of foam core height. The experimental heat transfer coefficients and pressure drops have been obtained by varying the air mass flow rate and the electrical power, which has been set at 25.0 kW m−2, 32.5 kW m−2, and 40.0 kW m−2. The results have been compared against those measured for 40 mm high samples, in order to study the effects of the foam core height on the heat transfer. Moreover, predictions from two recent models are compared with heat transfer coefficient and pressure drop experimental data. The predictions are in good agreement with experimental data.

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