Abstract
The development of thermal instabilities during an electrical wire explosion is analyzed in the present work based on the methods of small perturbation theory. For two cases, with and without allowance for motion, the dispersion equations are derived that describe a relationship between the instantaneous buildup increment and the axial wave vector component. It is demonstrated that the thermal instabilities are always formed during electrical explosion, irrespective of the explosion mode. There are three destabilizing factors leading to the development of the thermal instabilities: a temperature rise, an increase in the specific resistance with increasing temperature, and an increase in the specific resistance with decreasing density. The critical value of current density below which the sausage instabilities grow faster than the thermal ones and above which, on the contrary, the thermal instabilities are dominant can be found for each metal.
| Original language | English |
|---|---|
| Article number | 092103 |
| Journal | Physics of Plasmas |
| Volume | 15 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 9 Oct 2008 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Thermal instability during an electrical wire explosion. / Oreshkin, V. I.
In: Physics of Plasmas, Vol. 15, No. 9, 092103, 09.10.2008.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermal instability during an electrical wire explosion
AU - Oreshkin, V. I.
PY - 2008/10/9
Y1 - 2008/10/9
N2 - The development of thermal instabilities during an electrical wire explosion is analyzed in the present work based on the methods of small perturbation theory. For two cases, with and without allowance for motion, the dispersion equations are derived that describe a relationship between the instantaneous buildup increment and the axial wave vector component. It is demonstrated that the thermal instabilities are always formed during electrical explosion, irrespective of the explosion mode. There are three destabilizing factors leading to the development of the thermal instabilities: a temperature rise, an increase in the specific resistance with increasing temperature, and an increase in the specific resistance with decreasing density. The critical value of current density below which the sausage instabilities grow faster than the thermal ones and above which, on the contrary, the thermal instabilities are dominant can be found for each metal.
AB - The development of thermal instabilities during an electrical wire explosion is analyzed in the present work based on the methods of small perturbation theory. For two cases, with and without allowance for motion, the dispersion equations are derived that describe a relationship between the instantaneous buildup increment and the axial wave vector component. It is demonstrated that the thermal instabilities are always formed during electrical explosion, irrespective of the explosion mode. There are three destabilizing factors leading to the development of the thermal instabilities: a temperature rise, an increase in the specific resistance with increasing temperature, and an increase in the specific resistance with decreasing density. The critical value of current density below which the sausage instabilities grow faster than the thermal ones and above which, on the contrary, the thermal instabilities are dominant can be found for each metal.
UR - http://www.scopus.com/inward/record.url?scp=54749146754&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=54749146754&partnerID=8YFLogxK
U2 - 10.1063/1.2966121
DO - 10.1063/1.2966121
M3 - Article
VL - 15
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 9
M1 - 092103
ER -