.. _chap-md_suite_fortran:

The init_vel_atoms function
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init_vel_atoms 
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Function to initialize the value of the velocity of the atoms, following a random gaussian distribution center at a given temperature, and with total momentum zero. In this function the Boltzmann constant is in Hartree/Kelvin.
::
	init_vel_atoms(amu,temp, nat, vel_out)

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The input parameters for **init_vel_atoms**
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**amu** real(8) dimension (nat) array with the atomic mass of the atoms in the structure.

**temp** real(8) value of the temperature.

**nat** integer, number of atoms in the system.

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The output parameters for **init_vel_atoms**
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**vel_out**  real(8), dimension (3, nat), matrix with the initialized velocities of the atoms in the system.