Reply To: Laser Surface melting in fluent using udf

[Avinash Kumar]

• x[0] is the x-coordinate of the face centroid.
• x[1] is the y-coordinate of the face centroid.
• x_pos is a variable representing the current position of the heat source along the x-direction, which is updated based on the velocity and current simulation time (vel * current_time).
• A, B, and r are constants in your equation.
• F_PROFILE(f, thread, position) sets the temperature profile on the face.

Breaking down the equation:

• (x[0] - x_pos) represents the distance of the face centroid from the current x-position of the heat source.
• (pow((x[0] - x_pos), 2.) + pow(x[1], 2.)) is the square of the Euclidean distance of the face centroid from the current position of the heat source in both x and y directions.
• pow(r, 2.) is the square of the radius r.
• B * (pow((x[0] - x_pos), 2.) + pow(x[1], 2.)) / pow(r, 2.) is the argument inside the exponential term.
• exp(...) calculates the exponential function.