Heat Transfer Analysis in an Automated Venetian Blind Window System

1989 ◽  
Vol 111 (1) ◽  
pp. 89-95 ◽  
Author(s):  
S. Rheault ◽  
E. Bilgen
Keyword(s):  
Heat Transfer ◽  
Indoor Air ◽  
Heat Transfer Analysis ◽  
System Of Nonlinear Equations ◽  
Governing Equations ◽  
Thermal Exchange ◽  
Window System ◽  
Materials Used ◽  
Heat Exchanges ◽  
Venetian Blind

The heat transfer through an automated venetian blind window system is theoretically studied. The assumptions for the solution of the problem were: Heat transfer is unidimensional, heat exchanges are at steady-state for the whole system, thermal exchange by convection over the blind is negligible, materials used are diffuse-gray surfaces, and radiative exchanges with the room walls are considered as if all the surfaces are blackbodies at indoor air temperature. The solution of the governing equations (system of nonlinear equations) is carried out by using an iterative numerical method. Summarized results are presented and compared to the case of a regular window in a typical Canadian climate during winter and summer seasons and with different louver angles. It is found that by using an automated blind system, the predicted auxiliary load can be reduced by up to 36 percent and 47 percent for winter and summer, respectively.

Heat Transfer Analysis of a Finned Solar Air Heater

1988 ◽  
Vol 110 (2) ◽  
pp. 145-155 ◽  
Author(s):  
F. Issacci ◽  
Y. Zvirin ◽  
G. Grossman
Keyword(s):  
Heat Transfer ◽  
Theoretical Method ◽  
Lower Surface ◽  
Temperature Fields ◽  
Heat Transfer Analysis ◽  
Solar Air Heater ◽  
Governing Equations ◽  
Reversed Flow ◽  
Air Heater ◽  
Transfer Processes

A theoretical method is presented for the investigation of a reflective fin solar air heater. The heat transfer processes include radiation in both the solar and IR spectra, mixed convection (forced and natural) in the air and conduction in the fins. The governing equations have been solved numerically to obtain the velocity and temperature fields in the developing and developed flow regions. The efficiency of the finned structure is then calculated, and the results of a parametric study are shown. It has been found that natural convection effects are significant and strong buoyancy leads to separation and reversed flow. The efficiency increases with lower surface emissivity and lower thermal conductivity of the fins.

scholarly journals Heat Transfer Analysis and Magnetohydrodynamics Effect on Peristaltic Transport of Ree–Eyring Fluid in Rotating Frame

2021 ◽  
pp. 2714-2725
Author(s):  
Batool A. Almusawi ◽  
Ahmed M. Abdulhadi
Keyword(s):  
Heat Transfer ◽  
Heat Source ◽  
Flow Rate ◽  
Amplitude Ratio ◽  
Peristaltic Transport ◽  
Heat Transfer Analysis ◽  
Rotating Frame ◽  
Governing Equations ◽  
Source Sink

This paper discusses Ree–Eyring fluid’s peristaltic transport in a rotating frame and examines the impacts of Magnetohydrodynamics (MHD). The results deal with  systematically (analytically) applying each of the governing equations of Ree–Eyring fluid, the axial and secondary velocities, flow rate due to auxiliary stream, and bolus. The effects of some distinctive variables, such as Hartman number, heat source/sink, and amplitude ratio, are taken under consideration and illustrated through graphs.

Unsteady Flow and Heat Transfer in a Composite Porous Annulus with Time-Dependent Injection

2012 ◽  
Vol 67 (12) ◽  
pp. 657-664 ◽  
Author(s):  
Muhammad Nasir ◽  
Sufian Munawar ◽  
Ahmer Mehmood ◽  
Asif Alia
Keyword(s):  
Heat Transfer ◽  
Perturbation Series ◽  
Time Dependent ◽  
Heat Transfer Analysis ◽  
Temperature Profiles ◽  
Governing Equations ◽  
Flow And Heat Transfer ◽  
Oscillatory Velocity ◽  
Momentum And Heat Transfer ◽  
Heat Transfer Phenomenon

In the present study, we deal with the momentum and heat transfer analysis in a horizontal annulus of a composite porous medium. The Darcy-Brinkman model is used to develop the governing equations for the flow and heat transfer phenomenon. The annulus injects the time dependent oscillatory velocity normal to its surface. Both the regions of the flow have their own viscosities, and the heat transfer analysis is carried out by retaining viscous dissipation. The governing equations for flow and heat transfer are solved analytically using a perturbation series for solutions in both regions of the annulus. A brief parametric analysis is performed for the velocity and the temperature profiles through graphs.

Thermal Analysis of Artificial Dental Materials Using Numerical Simulation

2019 ◽  
pp. 195-216
Author(s):  
Thanigaiarasu Subramanian ◽  
Chitimada Narendra Kumar
Keyword(s):  
Heat Transfer ◽  
Dental Materials ◽  
Three Dimensional ◽  
Heat Transfer Analysis ◽  
Human Tooth ◽  
Heat Transfer Phenomenon ◽  
Simulation Results ◽  
Steady State Heat ◽  
Materials Used ◽  
Steady State Heat Transfer

A numerical investigation of steady state heat transfer phenomenon in human tooth is carried out in this present study. The materials generally used for repairing human tooth are ceramics, gold, structural steel, and copper. These materials are considered for the three-dimensional heat transfer analysis. The shape of the teeth is considered as perfect cubic of dimensions 5mm X 5mm X 1.5mm. The simulation results show that the teeth are subjected to temperatures of varying nature in both X and Y directions whereas Z direction is same. It is found that the temperature is maximum at the top of the teeth and minimum at bottom of the teeth (i.e., root). The contours of the heat transfer analysis for various teeth materials shows that the layers of the teeth are subjected to varying temperature. It is also found that the heat transfer characteristics depend not only on shape and boundary conditions but also on the materials used for the teeth selection.

scholarly journals The Two-Dimensional Heat Transfer Analysis in Arrayed Fins with the Thermal Dissipation Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Hai-Ping Hu
Keyword(s):  
Heat Transfer ◽  
Thermal Dissipation ◽  
Heat Transfer Analysis ◽  
Dimensionless Temperature ◽  
Two Dimensional ◽  
Governing Equations ◽  
Point Matching ◽  
Truncation Method ◽  
Laplace Equations ◽  
Series Truncation Method

The aim of the present study is to investigate the two-dimensional heat transfer analysis in arrayed fins with thermal dissipation substrate. The governing equations for the fins and the substrate are expressed with Laplace equations, and the boundary conditions around the fins and substrate are Robin conditions. The present investigation first aims to provide a solution with regard to the geometry models by a series truncation method. Then the research will compare the results of the series truncation method with the point-matching method. Furthermore, the present study will also discuss the effects of dimension and Biot number of the fins on local dimensionless temperature, mean temperature, and heat transfer rate.

scholarly journals First Solution of Fractional Bioconvection with Power Law Kernel for a Vertical Surface

Mathematics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 1366
Author(s):  
Muhammad Imran Asjad ◽  
Saif Ur Rehman ◽  
Ali Ahmadian ◽  
Soheil Salahshour ◽  
Mehdi Salimi
Keyword(s):  
Heat Transfer ◽  
Vertical Surface ◽  
Heat Transfer Analysis ◽  
Physical Parameters ◽  
Governing Equations ◽  
Fluid Properties ◽  
The Impact ◽  
The Given ◽  
Graphical Illustration ◽  
Fractional Parameter

The present study provides the heat transfer analysis of a viscous fluid in the presence of bioconvection with a Caputo fractional derivative. The unsteady governing equations are solved by Laplace after using a dimensional analysis approach subject to the given constraints on the boundary. The impact of physical parameters can be seen through a graphical illustration. It is observed that the maximum decline in bioconvection and velocity can be attained for smaller values of the fractional parameter. The fractional approach can be very helpful in controlling the boundary layers of the fluid properties for different values of time. Additionally, it is observed that the model obtained with generalized constitutive laws predicts better memory than the model obtained with artificial replacement. Further, these results are compared with the existing literature to verify the validity of the present results.

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