Numerical simulation of capillary plasma flow generated by high-current pulsed power

Kim, Kyoung-Jin

doi:10.1016/j.ijthermalsci.2005.04.007

Cited by 15 publications

(19 citation statements)

References 12 publications

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“…Then, with the solution, the conductivity is calculated and compared with the results of Kim [11]. In Figure 2, calculated conductivity for the polyethylene plasma as a function of temperature and pressure from present results and [11] are plotted.…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 2, calculated conductivity for the polyethylene plasma as a function of temperature and pressure from present results and [11] are plotted. As can be observed, present results are found to agree perfectly with the results of Kim [11] which could prove the accuracy of procedures (a)-(d) as well as the correctness of the coding work.…”

Section: Resultsmentioning

confidence: 99%

“…, . Similarly, as (11), only in the right side of (13) is unknown which indicates that ( = 1, 2, . .…”

Section: Methods Of Solving the Saha Equation Individuallymentioning

confidence: 99%

“…Equations (19)- (23) are the time-dependent 1D mathematical model used to simulate capillary discharge for the ET or ETC launch technology [4,11,21]. In this set of models, stands for time and stands for axial coordinate, is the mass density, is the velocity of the plasma flow, is the ablation rate which causes the increasing of , is the pressure, is the specific internal energy (SIE), is the conductivity, and 2 / is the inputting energy in the form of joule heating.…”

Section: Solving the Saha Equation In The Simulation Of Capillary Dismentioning

confidence: 99%

“…At such extreme conditions, plasmas are assumed to be in local thermodynamic equilibrium (LTE) and ablated material is fully dissociated into their elemental constituents and partially or fully ionized [11]. With these assumptions, the composition of plasma could be determined by solving the Saha equation.…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Efficient Method for the Solution of the Saha Equation in the Numerical Simulation of Capillary Discharge

Liu

Wan

et al. 2017

Advances in Mathematical Physics

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In the numerical simulation of capillary discharge for the Electrothermal (ET) or ET-chemical (ETC) launch system, one needs to solve the Saha equation to determine the composition of plasma for the transport coefficients. This would cause a relatively longer simulation runtime compared with conventional computational fluid dynamics problems. In this paper, the relatively difficult multidimensional problem of solving the Saha equation is transformed into a one-dimensional problem in the simulation of capillary discharge by constructing an iteration equation about temperature. A coefficient is introduced to ensure the convergence of this iteration equation. In order to improve the computational efficiency, this coefficient is further optimized and the methods of setting the iteration initial value dynamically are introduced. Several simulation tests are conducted to study the performance of these two methods. The results show that the simulation runtime could be significantly reduced with the methods presented in this paper.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…, . Similarly, as (11), only in the right side of (13) is unknown which indicates that ( = 1, 2, . .…”

Section: Methods Of Solving the Saha Equation Individuallymentioning

confidence: 99%

Section: Solving the Saha Equation In The Simulation Of Capillary Dismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Study on the Efficient Method for the Solution of the Saha Equation in the Numerical Simulation of Capillary Discharge

Liu

Wan

et al. 2017

Advances in Mathematical Physics

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Numerical Simulation of Plasma‐Propellant Interaction Under the Non‐Fourier Model

Zhang

2019

Propellants Explo Pyrotec

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Due to the signicant characteristics of shorter and more reproducible ignition delay, plasma ignition becomes one of the key technologies of electrothermal-chemical (ETC) propulsion. Plasma ignition is a complex heat transfer process, characterized by high temperature, high pressure, micro-scale and extremely short duration. Under such extreme conditions, the assumption that the propagation speed of thermal disturbance is infinite in Fourier's law is no longer applicable. As such, for accurate prediction the non-Fourier model with dual-phase-lag (DPL) is adopted to describe the interaction process between the plasma and the propellant. The temperature history of propellant is ob-tained by Dufort-frankel numerical difference method. The numerical results obtained by DPL model are compared with the results by the Fourier model and Cattaneo-Vernotte (CÀ V) model, it shows that the DPL model occupies preferable prediction performance. Additionally, the effects of plasma temperature, particle radius and absorber thickness on ignition delay are discussed. It finds that the ignition delay decreases with the increase of plasma temperature, increases with the increase of particle radius, and increases with the increase of absorber thickness. The numerical results based on DPL model are verified by the experimental results as well.

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Enhancing the penetration stability of plasma jet in liquid by improving the chamber structure

Liu

Mang

2019

Current Applied Physics

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Numerical simulation of capillary plasma flow generated by high-current pulsed power

Cited by 15 publications

References 12 publications

A Study on the Efficient Method for the Solution of the Saha Equation in the Numerical Simulation of Capillary Discharge

A Study on the Efficient Method for the Solution of the Saha Equation in the Numerical Simulation of Capillary Discharge

Numerical Simulation of Plasma‐Propellant Interaction Under the Non‐Fourier Model

Enhancing the penetration stability of plasma jet in liquid by improving the chamber structure

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