Research on modeling and parameter sensitivity of flow and heat transfer process in typical rectangular microchannels: From a data-driven perspective

2022 ◽  
Vol 172 ◽  
pp. 107356
Author(s):  
Yinjie Ma ◽  
Cheng Liu ◽  
Jiaqiang E ◽  
Xianwen Mao ◽  
Zhenhuan Yu
Keyword(s):  
Heat Transfer ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Parameter Sensitivity ◽  
Data Driven ◽  
Rectangular Microchannels ◽  
Flow And Heat Transfer

scholarly journals CFD Simulation of Natural Convection Flow and Heat Transfer Process in Rectangular Cavity

2019 ◽  
Vol 9 (1) ◽  
pp. 6121-6124
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Aspect Ratio ◽  
Heat Source ◽  
Transfer Process ◽  
Flow Behavior ◽  
Heat Transfer Process ◽  
Rectangular Cavity ◽  
Flow And Heat Transfer ◽  
Source Block

In this paper we investigate the natural convective heat transfer process inside a ventilated rectangular cavity with a projected heat source. The heat source block is mounted on the bottom wall and a horizontal vent is provided on the top wall of the rectangular cavity. The flow is induced due to the density difference which arises due to the variations in temperature between the heat source block and the surrounding ambient fluid. A FORTRAN 90 CFD solver is developed to simulate the natural convection phenomena by solving the Navier-stokes equation, energy equation coupled with Realizable k-ε turbulence model. The transient flow behavior inside the cavity is simulated by varying the heat source aspect ratios, Grashof number and the heat source locations. It is found that the heat source aspect ratio and its locations significantly influences the flow and heat transfer characteristics inside the cavity. The bidirectional exchange rate across the horizontal opening increases linearly with Grashof number and heat source aspect ratio. A chaotic flow behavior pattern is observed across the opening and the strength of the instabilities increases linearly with heat source aspect ratio. It is identified that by varying the aspect ratio 0.1 ≤ β ≤ 3, the average Nusselt number and mass flow rates are increased by 28% and 43% respectively.

Numerical Simulation on the Flow and Heat Transfer Process of Nanofluids Inside a Piston Cooling Gallery

2013 ◽  
Vol 65 (4) ◽  
pp. 378-400 ◽  
Author(s):  
Wang Peng ◽  
Lv Jizu ◽  
Bai Minli ◽  
Wang Yuyan ◽  
Hu Chengzhi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Flow And Heat Transfer ◽  
Piston Cooling

Design of the Blast Furnace Wall Structure Made of Efficient Materials. Part 4. Calculation Examples

2020 ◽  
Vol 786 (11) ◽  
pp. 30-34
Author(s):  
A.M. IBRAGIMOV ◽  
◽  
L.Yu. GNEDINA ◽  
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Blast Furnace ◽  
Boundary Value Problems ◽  
Transfer Process ◽  
Rational Design ◽  
Boundary Value ◽  
Heat Transfer Process ◽  
Furnace Wall ◽  
Time Interval

This work is part of a series of articles under the general title The structural design of the blast furnace wall from efficient materials [1–3]. In part 1, Problem statement and calculation prerequisites, typical multilayer enclosing structures of a blast furnace are considered. The layers that make up these structures are described. The main attention is paid to the lining layer. The process of iron smelting and temperature conditions in the characteristic layers of the internal environment of the furnace is briefly described. Based on the theory of A.V. Lykov, the initial equations describing the interrelated transfer of heat and mass in a solid are analyzed in relation to the task – an adequate description of the processes for the purpose of further rational design of the multilayer enclosing structure of the blast furnace. A priori the enclosing structure is considered from a mathematical point of view as the unlimited plate. In part 2, Solving boundary value problems of heat transfer, boundary value problems of heat transfer in individual layers of a structure with different boundary conditions are considered, their solutions, which are basic when developing a mathematical model of a non-stationary heat transfer process in a multi-layer enclosing structure, are given. Part 3 presents a mathematical model of the heat transfer process in the enclosing structure and an algorithm for its implementation. The proposed mathematical model makes it possible to solve a large number of problems. Part 4 presents a number of examples of calculating the heat transfer process in a multilayer blast furnace enclosing structure. The results obtained correlate with the results obtained by other authors, this makes it possible to conclude that the new mathematical model is suitable for solving the problem of rational design of the enclosing structure, as well as to simulate situations that occur at any time interval of operation of the blast furnace enclosure.

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