VIBRATIONAL BEHAVIOR OF DWCNT UNDER MAGNETIC FIELD CONSIDERING FSI AND SURFACE EFFECT

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GHORBANPOUR ARANI A.; KHODDAMI MARAGHI Z.; HAGHPARAST E.

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Seminar Paper

Paper Information

Seminar: CONFERENCE OF IRANIAN AEROSPACE SOCIETY
Year:2014 | Issue:13

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Title

VIBRATIONAL BEHAVIOR OF DWCNT UNDER MAGNETIC FIELD CONSIDERING FSI AND SURFACE EFFECT

Author(s)

GHORBANPOUR ARANI A. | KHODDAMI MARAGHI Z. | HAGHPARAST E. | Issue Writer Certificate

Keywords

MAGNETIC FIELD

SURFACE STRESS EFFECT

DWCNT

NONLOCAL VIBRATION

KNUDSEN NUMBER

Abstract

IN THIS RESEARCH, VIBRATION AND INSTABILITY OF DOUBLE–WALLED CARBON NANOTUBES (DWCNTS) CONVEYING FLUID PLACED IN UNIFORM LONGITUDINAL MAGNETIC FIELD IS CARRIED OUT USING NONLOCAL TIMOSHENKO BEAM (TB) MODEL. DWCNT IS EMBEDDED IN ELASTIC MEDIUM WHICH IS SIMULATED BY PASTERNAK FOUNDATION. EFFECT OF VAN DER WAALS (VDW) FORCES BETWEEN INNER AND THE OUTER NANOTUBES ARE TAKEN INTO ACCOUNT BASED ON THE LENNARD-JONES MODEL. CONSIDERING SLIP BOUNDARY CONDITIONS, GOVERNING MOTION EQUATIONS ARE DISCRETIZED AND DIFFERENTIAL QUADRATURE METHOD (DQM) IS APPLIED TO OBTAIN THE FREQUENCY OF DWCNTS FOR CLAMPED-CLAMPED BOUNDARY CONDITION. THE DETAILED PARAMETRIC STUDY IS CONDUCTED, FOCUSING ON THE REMARKABLE EFFECTS OF SURFACE STRESS, KNUDSEN NUMBER, MAGNETIC FIELD AND VELOCITY OF CONVEYING FLUID ON THE STABILITY OF DWCNT. RESULTS INDICATE THAT FLUID STRUCTURE INTERACTION (FSI) HAS SIGNIFICANT EFFECT ON CRITICAL FLUID VELOCITY OF DWCNTS. ALSO, IT IS FOUND THAT THE MAGNITUDE OF FREQUENCY IS STRONGLY DEPENDENT ON THE IMPOSED MAGNETIC FIELD SO THAT INCREASING THE MAGNETIC INTENSITY SIGNIFICANTLY ENLARGES THE STABILITY REGION OF DWCNT. IT IS EVIDENT THAT REGARDING SURFACE STRESS PLAYS AN IMPORTANT ROLE ON FREQUENCY OF DWCNT, INASMUCH AS INCREASING THICKNESS OF SURFACE LAYER CAUSES TO INCREASE STIFFNESS OF SYSTEM AND SUBSEQUENTLY LEADS TO RAISE NATURAL FREQUENCY OF DWCNT CONVEYING FLUID. THEREFORE DESIGNERS COULD MEET THEIR PURPOSES BY SELECTING THE SUITABLE THICKNESS OF SURFACE LAYER. IN ADDITION, TREND OF FIGURES HAVE GOOD AGREEMENT WITH THE PREVIOUS RESEARCHES. RESULTS OF THIS INVESTIGATION COULD BE APPLIED FOR OPTIMUM DESIGN OF NANO/MICRO MECHANICAL DEVICES FOR CONTROLLING STABILITY OF DWCNTS CONVEYING FLUID UNDER MAGNETIC FIELDS.

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APA: Copy

GHORBANPOUR ARANI, A., KHODDAMI MARAGHI, Z., & HAGHPARAST, E.. (2014). VIBRATIONAL BEHAVIOR OF DWCNT UNDER MAGNETIC FIELD CONSIDERING FSI AND SURFACE EFFECT. CONFERENCE OF IRANIAN AEROSPACE SOCIETY. SID. https://sid.ir/paper/947775/en

Vancouver: Copy

GHORBANPOUR ARANI A., KHODDAMI MARAGHI Z., HAGHPARAST E.. VIBRATIONAL BEHAVIOR OF DWCNT UNDER MAGNETIC FIELD CONSIDERING FSI AND SURFACE EFFECT. 2014. Available from: https://sid.ir/paper/947775/en

IEEE: Copy

A. GHORBANPOUR ARANI, Z. KHODDAMI MARAGHI, and E. HAGHPARAST, “VIBRATIONAL BEHAVIOR OF DWCNT UNDER MAGNETIC FIELD CONSIDERING FSI AND SURFACE EFFECT,” presented at the CONFERENCE OF IRANIAN AEROSPACE SOCIETY. 2014, [Online]. Available: https://sid.ir/paper/947775/en

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