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{
version 2.0;
format ascii;
class uniformDimensionedVectorField;
object g;
}
dimensions [0 1 -2 0 0 0 0];
value (0 -0.98 0);
// Hysing 无量纲 g*=-0.98; 有量纲值 g = g* × U_ref^2 / L_ref
// = -0.98 × 1^2 / 1 = -0.98 m/s^2
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