Study on the mesh size determination method of blast wave numerical simulation with strong applicability

Area of Science:

• Computational physics
• Explosion dynamics
• Numerical modeling

Background:

• Numerical simulations are crucial for understanding blast wave propagation.
• Simulation accuracy heavily relies on appropriate mesh size selection.
• Existing mesh size determination methods lack generality.

Purpose of the Study:

• To propose a universally applicable method for determining mesh size in blast wave simulations.
• To enhance the accuracy and reliability of explosion event simulations.

Main Methods:

• A novel mesh size determination method is presented.
• Mesh size is calculated as the product of a scale coefficient and the cube root of equivalent TNT mass.
• The scale coefficient is defined based on model dimension, scaled distance, and simulation accuracy.

Main Results:

• The proposed method demonstrates strong applicability and accuracy.
• Recommended scale coefficients are provided for 1D, 2D, and 3D models.
• The method's rationality is validated against existing blast wave simulation data.

Conclusions:

• The developed method offers a reliable approach for mesh size determination in blast wave simulations.
• The provided scale coefficients serve as a valuable reference for engineering accuracy.
• This work improves the precision of numerical simulations for explosion events.