ac electric fields drive steady flows in flames.
Phys Rev E Stat Nonlin Soft Matter Phys
; 86(3 Pt 2): 036314, 2012 Sep.
Article
em En
| MEDLINE
| ID: mdl-23031020
ABSTRACT
We show that time-oscillating electric fields applied to plasmas present in flames create steady flows of gas. Ions generated within the flame move in the field and migrate a distance δ before recombining; the net flow of ions away from the flame creates a time-averaged force that drives the steady flows observed experimentally. A quantitative model describes the response of the flame and reveals how δ decreases as the frequency of the applied field increases. Interestingly, above a critical frequency, ac fields can be used to manipulate flames at a distance without the need for proximal electrodes.
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Base de dados:
MEDLINE
Assunto principal:
Reologia
/
Incêndios
/
Modelos Químicos
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article