Abstract
The stability of isothermal spinning of viscoelastic fluids which have strain-rate dependent relaxation time has been investigated using the linear stability analysis method. The instability known as draw resonance of the system was found to be dependent upon the material functions of the fluids like fluid relaxation time and the strain-rate dependency of the relaxation time as well as upon the draw-down ratio of the process. Utilizing the fundamental physics of the system characterized by the traveling kinematic waves, we also have developed a simple, approximate method for determining this draw resonance instability; it requires only the steady state velocity solutions of the system, in contrast to the exact stability analysis method which requires solving the transient equations. The stability curves produced by this simple, fast method agree well with those by the exact stability method, proving the utility of the method. The stability of other extensional deformation processes such as film casting and film blowing can also be analyzed using the method developed in this study.
| Original language | English |
|---|---|
| Pages (from-to) | 325-330 |
| Number of pages | 6 |
| Journal | Korean Journal of Chemical Engineering |
| Volume | 16 |
| Issue number | 3 |
| Publication status | Published - 1999 May 1 |
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Keywords
- Draw Resonance
- Linear Stability Analysis
- Maxwell Fluids
- Strain-Rate Dependent Relaxation Time
- Throughput Waves
- Traveling Velocity
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
Cite this
Stability of Isothermal Spinning of Viscoelastic Fluids. / Jung, Hyun Wook; Hyun, Jae Chun.
In: Korean Journal of Chemical Engineering, Vol. 16, No. 3, 01.05.1999, p. 325-330.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stability of Isothermal Spinning of Viscoelastic Fluids
AU - Jung, Hyun Wook
AU - Hyun, Jae Chun
PY - 1999/5/1
Y1 - 1999/5/1
N2 - The stability of isothermal spinning of viscoelastic fluids which have strain-rate dependent relaxation time has been investigated using the linear stability analysis method. The instability known as draw resonance of the system was found to be dependent upon the material functions of the fluids like fluid relaxation time and the strain-rate dependency of the relaxation time as well as upon the draw-down ratio of the process. Utilizing the fundamental physics of the system characterized by the traveling kinematic waves, we also have developed a simple, approximate method for determining this draw resonance instability; it requires only the steady state velocity solutions of the system, in contrast to the exact stability analysis method which requires solving the transient equations. The stability curves produced by this simple, fast method agree well with those by the exact stability method, proving the utility of the method. The stability of other extensional deformation processes such as film casting and film blowing can also be analyzed using the method developed in this study.
AB - The stability of isothermal spinning of viscoelastic fluids which have strain-rate dependent relaxation time has been investigated using the linear stability analysis method. The instability known as draw resonance of the system was found to be dependent upon the material functions of the fluids like fluid relaxation time and the strain-rate dependency of the relaxation time as well as upon the draw-down ratio of the process. Utilizing the fundamental physics of the system characterized by the traveling kinematic waves, we also have developed a simple, approximate method for determining this draw resonance instability; it requires only the steady state velocity solutions of the system, in contrast to the exact stability analysis method which requires solving the transient equations. The stability curves produced by this simple, fast method agree well with those by the exact stability method, proving the utility of the method. The stability of other extensional deformation processes such as film casting and film blowing can also be analyzed using the method developed in this study.
KW - Draw Resonance
KW - Linear Stability Analysis
KW - Maxwell Fluids
KW - Strain-Rate Dependent Relaxation Time
KW - Throughput Waves
KW - Traveling Velocity
UR - http://www.scopus.com/inward/record.url?scp=0342818916&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0342818916&partnerID=8YFLogxK
M3 - Article
VL - 16
SP - 325
EP - 330
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
SN - 0256-1115
IS - 3
ER -