Drop oscillation and mass transfer in alternating electric fields. Progress report, May 30, 1991--June 1, 1992
In certain cases droplet direct contact heat transfer rates can be significantly enhanced by the application of an alternating electric field. This field can produce shape oscillations in a droplet which will enhance mixing. The theoretical evaluation of the effect of the interaction of the field with drop charge on the hydrodynamics has been completed for small amplitude oscillations. Previous work with a zero order perturbation method was followed up with a first order perturbation method to evaluate the effect of drop distortion on drop charge and field distribution. The first order perturbation results show secondary drop oscillations of four modes and two frequencies in each mode. The most significant secondary oscillation has the same mode and frequency as the second mode oscillation predicted from the first order perturbation work. The resonant frequency of all oscillations decrease with increasing electric field strength and drop charge. Work is currently underway to evaluate the heat transfer enhancement from an applied alternating electric field.
- Research Organization:
- Idaho Univ., Moscow, ID (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG07-86ER13572
- OSTI ID:
- 10188178
- Report Number(s):
- DOE/ER/13572-5; ON: DE93003595
- Resource Relation:
- Other Information: PBD: 24 Jun 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Linear oscillations of a drop in uniform alternating electric fields
Linear oscillations of a drop in uniform alternating electric fields. [Annual report, 1989]