Computational fluid dynamic time evolution of crop transpiration and heat transfer inside a Venlo greenhouse

Drying chamber adalah alat pengering bahan baku semen yang akan digiling dalam raw mill. Keefektifan kerja raw mill sangat dipengaruhi oleh sistem pengeringan pada bahan baku yang akan digiliing. Pengeringan di dalam drying chamber ini menggunakan udara panas dari kiln exhaust gas aliran ducting string B. Semakin kering bahan akan semakin mudah proses penggilingan. Heat transfer dari fluida ke bahan yang akan dkeringkan sangat penting agar diperoleh pengeringan yang optimum. Penelitian ini dilakukan dengan tujuan untuk mengetahui sacara teknis faktor yang mempemharuhi heat transfer dari udara pengering ke bahan yang dikeringkan dengan bantuan aplikasi computational fluid dynamic (CFD). Hasil simulasi yang dilakukan menggunakan CFD adalah heat transfer berbanding lurus dengan temperature dan velocity udara pengering, namun berbanding terbalik dengan waktu tinggal udara dalam drying chamber.Heat transfer optimum yang diperoleh pada penelitian ini adalah pada perlakuan velocity15 mm/s, temperature 300 0C yaitu 901.480 Btu/s. Kata kunci: CFD, drying chamber, heat transfer, velocity, temperatur

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Computational Fluid Dynamic- Two Fluid Model Study of Gas-Solid Heat Transfer in a Riser with Various Inclination Angles

International Journal of Engineering ◽

10.5829/idosi.ije.2017.30.04a.02 ◽

2017 ◽

Vol 30 (4) ◽

Keyword(s):

Heat Transfer ◽

Computational Fluid Dynamic ◽

Fluid Model ◽

Fluid Dynamic ◽

Model Study ◽

Inclination Angles ◽

Two Fluid Model ◽

Two Fluid

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Computational fluid dynamic and heat transfer analysis of an Al/SiC IGBT power hybrid package

Proceedings 3rd International Symposium on Advanced Packaging Materials Processes, Properties and Interfaces ◽

10.1109/isapm.1997.581286 ◽

2002 ◽

Cited By ~ 1

Author(s):

J.M. Fusaro ◽

P. Rodriguez

Keyword(s):

Heat Transfer ◽

Computational Fluid Dynamic ◽

Fluid Dynamic ◽

Heat Transfer Analysis

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Summary on the Results of Two Computational Fluid Dynamic Benchmarks of Tube and Different Channel Geometries

Journal of Nuclear Engineering and Radiation Science ◽

10.1115/1.4038162 ◽

2017 ◽

Vol 4 (1) ◽

Cited By ~ 3

Author(s):

Attila Kiss ◽

Andrey Churkin ◽

Darwan S. Pilkhwal ◽

Abhijeet M. Vaidya ◽

Walter Ambrosini ◽

...

Keyword(s):

Heat Transfer ◽

Boundary Conditions ◽

Computational Fluid Dynamic ◽

Prediction Accuracy ◽

Fluid Dynamic ◽

Annular Channel ◽

Initial Boundary ◽

Sensitivity Analyses ◽

Cfd Models

Two computational fluid dynamic (CFD) benchmarks have been performed to assess the prediction accuracy and sensitivity of CFD codes for heat transfer in different geometries. The first benchmark focused on heat transfer to water in a tube (first benchmark), while the second benchmark covered heat transfer to water in two different channel geometries (second benchmark) at supercritical pressures. In the first round with the experimental data unknown to the participants (i.e., blind calculations), CFD calculations were conducted with initial boundary conditions and simpler CFD models. After assessment against measurements, the calculations were repeated with the refined boundary conditions and material properties in the follow-up calculation phase. Overall, the CFD codes seem to be able to capture the general trend of heat transfer in the tube and the annular channel but further improvements are required in order to enhance the prediction accuracy. Finally, sensitivity analyses on the numerical mesh and the boundary conditions were performed. It was found that the prediction accuracy has not been improved with the introduction of finer meshes and the effect of mass flux on the result is the strongest among various investigated boundary conditions.

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