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INTERNATIONAL JOURNAL OF SCIENTIFIC DEVELOPMENT AND RESEARCH
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ISSN Approved Journal No: 2455-2631 | Impact factor: 8.15 | ESTD Year: 2016
open access , Peer-reviewed, and Refereed Journals, Impact factor 8.15

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Volume 9 | Issue 3

Impact factor: 8.15

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Paper Title: CFD SIMULATION OF HEAT TRANSFER IN VERTICAL RIBBED TUBE
Authors Name: Chandrakant Rathod , Kashinath I swami , Rahul Patil , R.C. Biradar
Unique Id: IJSDR1609054
Published In: Volume 1 Issue 9, September-2016
Abstract: Computational Fluid Dynamics (CFD) simulation of heat transfer and fluid flow analysis in the turbulent flow regime in a spirally ribbed tube and a smooth tube in vertical orientation are simulated in this project using ANSYS Fluent. The ribbed tube has outside diameter of 25mm, maximum inner diameter of 18.80mm, minimum inner diameter of 17.50mm and pitch varied from 2m to 0.25m.The smooth tube has outside diameter of 26.7mm and inner diameter of 18.88mm. Both tubes were uniformly heated by passing an electrical current along the tube with a heated length of 1m. The CFD simulation is performed on a vertical orientation of the steel tubes (rifled and smooth) under six different inlet velocities of 0.893m/s, 1.786m/s, 2.38m/s, 2.976m/s,3.57m/s and 4.166m/s. The main objective of this thesis is to determine the heat transfer and pressure drop in both vertical smooth and ribbed tubes. The fluid used is water and the initial temperature is 25oC. The heat flux that for heating the tube is equal to 150KW/m2. During the CFD simulation analysis it was found that for smooth tube at lower inlet velocity, the temperature increases from 298K to 310.4K while the pressure drop between inlet and outlet is equal to 598 Pa. At higher inlet velocity, the temperature for smooth tube is found increasing from 298K to 301.53K, with the pressure drop is equal to 7368.1 Pa. Smooth tubes results are validated again analytical calculation, it is agreed well with analytical results. For the ribbed tube at lower inlet velocity the temperature is increasing from 298K to 313.5K, with the pressure drop is found to be 622.1 Pa for 0.25m pitch. In the case of a higher inlet velocity, the temperature increase in ribbed tube is increasing from 298K to 304.5K, while the pressure drop is equal to 8087.1 Pa. It is clear that the temperature difference between ribbed and smooth tube at lower inlet velocity are equal to 15.5K and 12.4 K, respectively. While at higher inlet velocity there, temperature difference becomes 6.5 K, and 3.5 K respectively. This result indicates that the ribbed tube has higher heat transfer efficiency than the smooth tube. The pressure drop in the ribbed tube is found to be higher than that of the smooth tube. This clearly shows that the characteristic of ribbed tube is much better than smooth tube.
Keywords: Computational Fluid Dynamics, Computation Heat Flux Helix, angle Specific heat, Pressure.
Cite Article: "CFD SIMULATION OF HEAT TRANSFER IN VERTICAL RIBBED TUBE", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.1, Issue 9, page no.350 - 359, September-2016, Available :http://www.ijsdr.org/papers/IJSDR1609054.pdf
Downloads: 000336257
Publication Details: Published Paper ID: IJSDR1609054
Registration ID:160765
Published In: Volume 1 Issue 9, September-2016
DOI (Digital Object Identifier):
Page No: 350 - 359
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631

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