224,232 research outputs found
Development of EHD Ion-Drag Micropump for Microscale Electronics Cooling Systems
In this investigation, the numerical simulation of electrohydrodynamic (EHD)
ion-drag micropumps with micropillar electrode geometries have been performed.
The effect of micropillar height and electrode spacing on the performance of
the micropumps was investigated. The performance of the EHD micropump improved
with increased applied voltage and decreased electrode spacing. The optimum
micropillar height for the micropump with electrode spacing of 40m and
channel height of 100m at 200V was 40m, where a maximum mass flow
rate of 0.18g/min was predicted. Compared to that of planar electrodes, the 3D
micropillar electrode geometry enhanced the overall performance of the EHD
micropumps.Comment: Submitted on behalf of TIMA Editions
(http://irevues.inist.fr/tima-editions
Unified description of pairing, trionic and quarteting states for one-dimensional SU(4) attractive fermions
Paired states, trions and quarteting states in one-dimensional SU(4)
attractive fermions are investigated via exact Bethe ansatz calculations. In
particular, quantum phase transitions are identified and calculated from the
quarteting phase into normal Fermi liquid, trionic states and spin-2 paired
states which belong to the universality class of linear field-dependent
magnetization in the vicinity of critical points. Moreover, unified exact
results for the ground state energy, chemical potentials and complete phase
diagrams for isospin attractive fermions with external fields
are presented. Also identified are the magnetization plateaux of
and , where is the magnetization saturation value. The
universality of finite-size corrections and collective dispersion relations
provides a further test ground for low energy effective field theory.Comment: 13 pages, 4 figure
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