The Study of Effects of Gravity Modulation on Double Diffusive Convection in Oldroyd-B Liquids

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K. Anjana
K. Anjana
2
R. K. Vanishree
R. K. Vanishree
1 Maharani Science College for Women
2 Maharani’s Science college for Women

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The effect of gravity modulation is analysed in Oldroyd-B liquids subjected to double diffusive convection. Both linear and non-linear analysis has been done. A regular perturbation technique has been employed to arrive at the thermal Rayleigh number. The results show that stress relaxation destabilises the system whereas strain retardation parameter and Lewis number stabilises the system. Truncated Fourier series expansion gives a system of Lorentz equations that represent the non-linear analysis. Nusselt and Sherwood numbers are used to quantify the heat and mass transfer respectively. It is observed that Lewis number and strain retardation parameter decreases heat and mass transfer and stress relaxation parameter increases them. It is seen that modulation gives rise to sub-critical motion.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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No ethics committee approval was required for this article type.

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K. Anjana. 2017. \u201cThe Study of Effects of Gravity Modulation on Double Diffusive Convection in Oldroyd-B Liquids\u201d. Global Journal of Science Frontier Research - F: Mathematics & Decision GJSFR-F Volume 17 (GJSFR Volume 17 Issue F5): .

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GJSFR Volume 17 Issue F5
Pg. 51- 69
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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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GJSFR-F Classification: MSC 2010: 83C27
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v1.2

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August 24, 2017

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English

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The effect of gravity modulation is analysed in Oldroyd-B liquids subjected to double diffusive convection. Both linear and non-linear analysis has been done. A regular perturbation technique has been employed to arrive at the thermal Rayleigh number. The results show that stress relaxation destabilises the system whereas strain retardation parameter and Lewis number stabilises the system. Truncated Fourier series expansion gives a system of Lorentz equations that represent the non-linear analysis. Nusselt and Sherwood numbers are used to quantify the heat and mass transfer respectively. It is observed that Lewis number and strain retardation parameter decreases heat and mass transfer and stress relaxation parameter increases them. It is seen that modulation gives rise to sub-critical motion.

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The Study of Effects of Gravity Modulation on Double Diffusive Convection in Oldroyd-B Liquids

R. K. Vanishree
R. K. Vanishree Maharani’s Science college for Women
K. Anjana
K. Anjana Maharani Science College for Women

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