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Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients
นักวิจัย : Ding, Zijing , Wong, Teck Neng
คำค้น : DRNTU::Engineering::Mechanical engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Ding, Z., & Wong, T. N. (2014). Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients. Physical Review E, 89(3), 033010-. , 1539-3755 , http://hdl.handle.net/10220/19547 , http://dx.doi.org/10.1103/PhysRevE.89.033010
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Physical review E
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

In this paper, the electrohydrodynamic stability in an annular liquid layer with a radial electrical conductivity gradient is investigated. A weak shear flow arises from a constant pressure gradient in the axial direction. In the radial direction, an electric field is applied. The three-dimensional linear instability analysis is implemented to study the influence of the inner radius, electrical conductivity gradient, shear flow, and ionic diffusion on the dynamics of the fluid layer. It is found that the critical unstable mode may either be oscillatory or stationary. The system becomes more unstable as the dimensionless inner radius a increases. When the inner radius a is small, the critical unstable mode is stationary, while it is given by three-dimensional oblique waves when a is large. When the conductivity gradient is small, the critical unstable mode is the three-dimensional oblique wave, while when the conductivity gradient is large, it would switch to the stationary mode rather than the oscillatory mode. The system becomes more unstable when the Reynolds number is slightly increased from zero. Additionally, it is found that the electrical Schmidt number has dual effects. The liquid layer becomes either more unstable or stable as the electric Schmidt number increases.

บรรณานุกรม :
Ding, Zijing , Wong, Teck Neng . (2557). Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ding, Zijing , Wong, Teck Neng . 2557. "Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ding, Zijing , Wong, Teck Neng . "Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Ding, Zijing , Wong, Teck Neng . Electrohydrodynamic instability in an annular liquid layer with radial conductivity gradients. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.