Fluid dynamic numerical simulation coupled with heat transfer and reaction in the tubular reactor of industrial cracking furnaces

2009 ◽  
pp. n/a-n/a
Author(s):  
Chufu Li ◽  
Tong Qiu ◽  
Bingzhen Chen ◽  
Liang Tian ◽  
Bangyong Song ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Fluid Dynamic ◽  
Tubular Reactor ◽  
Dynamic Numerical Simulation

scholarly journals Thermal and Fluid Dynamic Analysis of Compact Fin-and-Tube Heat Exchangers for Automotive Applications

2018 ◽  
Vol 225 ◽  
pp. 05019
Author(s):  
A.Y. Adam ◽  
A.N. Oumer ◽  
Azri Alias ◽  
M. Ishak ◽  
R. Mamat ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Reynolds Number ◽  
Heat Exchangers ◽  
Fluid Dynamic ◽  
Industrial Applications ◽  
Experimental Results ◽  
Flat Tube ◽  
Tube Heat Exchanger ◽  
Flat Tubes

Flat tubes heat exchangers are commonly used in many industrial applications as a consequence of the distinctive geometrical characteristics of the flat tube compared with round tube. This paper aims to investigate the flow and heat transfer characteristics of laminar cross-flow forced convection in compact fin-and-flat tube heat exchangers. The experiment was performed to explore the influence of the tube inclination angle on the thermal hydraulic performance of the flat tube heat exchanger. Four flat tubes arranged in two aligned rows having the same longitudinal and transverse pitches have been examined in the range of Reynolds number between 1768.27 and 2259.46. A constant heat flux of 4169.63 W/m2 was applied at the inner surface of each flat tube. On the other hand, the numerical simulation is solved by ANSYS FLUENT for a two dimensional model with unstructured mesh and the results are compared against the experimental results. The numerical simulation results indicate that the average Nusselt number increased by 78.24 % for Reynolds number 1768.27. Besides that, for Reynolds number 1964.75 and 2259.46 the Nusselt numbers were increased by 75.89 % and 54.49%, respectively, compared to experimental results. Moreover, the pressure drop is increased 25 % and 83.38 % for both experimental and numerical simulation with respect to three Reynolds number. It was found that, the tube with 30° degree provides the higher heat transfer with Reynolds number 2259.46. This study could assist engineers in decisions regarding the application of compact fin-and-tube heat exchangers in the automotive field.

Numerical Simulation of Nanofluids for Improved Cooling Efficiency in Microchannel Heat Sink

2014 ◽  
Vol 695 ◽  
pp. 403-407 ◽  
Author(s):  
Nur Hazwani Mohamad Noh ◽  
Nor Azwadi Che Sidik
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Heat Sink ◽  
Rectangular Cross Section ◽  
Fluid Dynamic ◽  
Constant Heat Flux ◽  
Working Fluid ◽  
Microchannel Heat Sink ◽  
Rectangular Microchannel ◽  
3 Dimensional

Numerical simulation on 3-dimensional rectangular cross section of microchannel heat sink is conducted to investigate the effect of various type coolant consist of water and different type of nanofluids on the cooling performance of microchannel heat sink. FLUENT, a Computational Fluid Dynamic (CFD) is used as the solver of simulation. A rectangular microchannel with hydraulic diameter of 86um and length of 10mm under the boundary condition of constant heat flux and laminar flow with uniform inlet velocity with five sets of working fluid with different nanofluids. The defined model is validated with previous studies of numerical analysis. Results of present work show that using Diamond-H2O as cooling lead to higher efficiency of heat transfer in microchannel heat sink in comparison to others nanofluid and base fluid. Numerical results show that increasing the thermal conductivity of working fluid can enhanced heat transfer. Nusselt number follows the incremental in Reynolds number.

Fluid dynamic numerical simulation of a gas phase polymerization reactor

2003 ◽  
Vol 43 (10-11) ◽  
pp. 1199-1220 ◽  
Author(s):  
Anne Gobin ◽  
Hervé Neau ◽  
Olivier Simonin ◽  
Jean-Richard Llinas ◽  
Vince Reiling ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Gas Phase ◽  
Fluid Dynamic ◽  
Polymerization Reactor ◽  
Gas Phase Polymerization ◽  
Dynamic Numerical Simulation
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