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In previous simulations, I primarily used velocity, vorticity, and pressure fields for postprocessing and visual analysis. Recently, I explored two additional and powerful techniques for flow field visualization in COMSOL: the arrow plot and the streamline plot.

• Streamline plots highlight the global trajectories of the flow, offering an intuitive view of pathlines and circulation.
• Arrow plots emphasize the local magnitude and direction of vector fields, providing detailed insight into spatial variations.

The notes below summarize key concepts, setup methods, and practical visualization tips for both approaches.

📌 COMSOL Arrow Plot Notes

I. What Is an Arrow Plot and Why Use It?

Definition: Arrow plots are a powerful tool in COMSOL Multiphysics for visualizing vector fields such as velocity fields, magnetic fields, temperature gradients, etc.

Purpose:

• Show both direction and magnitude
• Reveal local flow paths, gradient orientations, and field structure

II. Types and Dimensions of Arrow Plots

III. Step-by-Step Setup and Optimization Tips

1. Adding an Arrow Plot

• Go to Results > 3D Plot Group
• Right-click to add Arrow Volume, Arrow Surface, or Arrow Line
• Select vector variables (e.g., u, v, w or vx, vy, vz)

2. Visual Enhancement Techniques