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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
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Paper Title: Study on dependence of Cavitation number on Supercavitation phenomenon using Transient Multiphase Analysis
Authors Name: Siddhant Vikram Avhad
Unique Id: IJSDR2007102
Published In: Volume 5 Issue 7, July-2020
Abstract: Cavitation causes many adverse effects in engineering applications, but this phenomenon could be used in a different way to reduce the viscous drag on objects travelling under water. As water due to its high density will impose high drag force. With the help of cavitation bubble the drag could be reduced drastically as the body of the object will be covered with less dense gas or vapour. Thus, it becomes important to study the cavitation parameters to predict the shape of cavity formed and drag force experienced by the object to ensure efficient travel under water. Cavitation number is the key factor affecting the cavitation phenomenon thus it is the independent quantity during analysis. Before running the simulation, grid independence test was performed to enhance the accuracy and reduce errors due to meshing. The article gives insight about the setting up of transient multiphase simulation for supercavitating flows. The time-stepping method selected for the simulation was “Variable” which ensures adaptive time-step size according to the mesh without changing the courant number in any case. The dependence of surface closure time on cavitation number is studied by observing the vapor volume fraction contour plots. Further the graphs of cavity diameter and drag coefficient are plotted considering cavitation number as independent quantity. From the data points a relation was found for drag coefficient in terms of cavitation number with less than 11% of error as compared to empirical formula stated before. Thus, using this simulation model with similar setup cavitation phenomenon could be studied reducing the initial errors faced due to meshing and improper setup of the model.
Keywords: Supercavitation, Disk-Cavitators, Multiphase analysis, Drag Coefficient, Cavitation number.
Cite Article: "Study on dependence of Cavitation number on Supercavitation phenomenon using Transient Multiphase Analysis", International Journal of Science & Engineering Development Research (www.ijsdr.org), ISSN:2455-2631, Vol.5, Issue 7, page no.709 - 715, July-2020, Available :http://www.ijsdr.org/papers/IJSDR2007102.pdf
Downloads: 000336256
Publication Details: Published Paper ID: IJSDR2007102
Registration ID:192205
Published In: Volume 5 Issue 7, July-2020
DOI (Digital Object Identifier): http://doi.one/10.1729/Journal.24149
Page No: 709 - 715
Publisher: IJSDR | www.ijsdr.org
ISSN Number: 2455-2631

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