Details

Autor(en) / Beteiligte

• S, Sai Shiva
• Guthikonda, Nagaraju
• Kameswari, D. P. S. L
• Kiran, P. Prem
• Ikkurthi, V. R

Titel

A Three Dimensional Three Temperature Radiation Hydrodynamic Simulations of Laser Produced Air Plasma Dynamics in Ambient Atmospheric Air

Ist Teil von

• 2020 IEEE International Conference on Plasma Science (ICOPS), 2020, p.285-285

Ort / Verlag

IEEE

Erscheinungsjahr

2020

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• A three-dimensional (3D), three temperature (T e , T i , T r ) radiation hydrodynamic (3D-3T-RHD) numerical simulations of laser induced air plasma dynamics and subsequent shock wave expanding in ambient atmospheric air has been performed using FLASH code 1, 2 . Experimentally, the air plasma was generated using Nd:YAG laser operated at 532 nm, 10 ns pulse duration and with the input laser energy of 25 mJ focused within a spot diameter of \square 500\pm 50\ \mu \mathrm{m} . Understanding the 3D evolution dynamics as well as the laser energy conversion into different forms such as, plasma generation, shock wave expansion and the radiation emissions are the key parameters that need to have proper information. Having this knowledge will be very useful and important in applications such as, drag reduction using the localized flow control of blunt bodies 3 , laser-spark ignition of fuel-air mixtures in closed chambers 4 etc. Shadowgraphy technique used in our experimental study can diagnose and manifest the shock evolution in 2D only. Hence, to understand the plasma and shock evolution characteristics in all three directions, the 3D simulations have been carried out. The simulated results show good agreement with the experimentally obtained shock wave velocity.