scholarly journals EXPERIMENTAL STUDY AND NUMERICAL SIMULATION OF HYDRODYNAMICS AND HEAT TRANSFER IN A COLD-WALL CVD REACTOR

1991 ◽  
Vol 02 (C2) ◽  
pp. C2-175-C2-182
Author(s):  
H. CHEHOUANI ◽  
B. ARMAS ◽  
C. COMBESCURE ◽  
S . BENET ◽  
S. BRUNET
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Cold Wall

Review on the Heat Transfer Enhancement by Inserting Circular Cylinders

2013 ◽  
Vol 860-863 ◽  
pp. 645-648
Author(s):  
Ya Yuan Bao ◽  
Yin Nan Yuan ◽  
Guan Nan Xi
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Heat Transfer Enhancement ◽  
Circular Cylinders ◽  
Transfer Enhancement ◽  
Single Cylinder ◽  
Developing Trend

The paper presents heat transfer enhancement by inserting a cylinder as spoiler element. It has a great significance for engineering. But its mechanism is still not very clear. Aiming at this problem, numerical simulation and experimental study on heat transfer enhancement by single cylinder or multi-row cylinders are summarized in this research. And they are also compared with other shape components. According to the results, the developing trend of heat transfer enhancement by cylinders is pointed out.

Natural Convection in a Partially Heat Generating Rod Bundle Inside an Enclosure

2010 ◽  
Vol 132 (10) ◽  
Author(s):  
D. Jaya Krishna ◽  
M. R. Thansekhar ◽  
S. P. Venkateshan ◽  
Tanmay Basak ◽  
Sarit K. Das
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Porous Media ◽  
Natural Convection ◽  
Temperature Distribution ◽  
Diameter Ratio ◽  
Rod Bundles ◽  
Rod Bundle ◽  
Power Inputs

Buoyancy induced flows in a partially heat generating rod bundle enclosed inside a tall cavity are investigated. First, a detailed experimental study is carried out, and the thermal hydraulics is analyzed at different power inputs and boundary cooling rates of the enclosure. Later, a generalized non-Darcy simulation is developed using a heat generating orthotropic porous media approach and is compared with the experimental results. The results of a numerical simulation for natural convection in enclosed partially heat generating rod bundles satisfactorily predict the temperature distribution within the rod bundle. Finally, a parametric study is carried out by varying the porosity (pitch to diameter ratio of the rod bundle) of the considered enclosure for the understanding of flow physics and heat transfer in such applications.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

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