.. _chap-md_suite_fortran:

The init_vel_lattice function
##############################

================
init_vel_lattice 
================
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_lattice(bmass, temp, h_in, h_dot_out)

=============================================
The input parameters for **init_vel_lattice**
=============================================

**bmass** real(8) mass of the barostat.

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

**h_in** real(8), dimension (3,3) lattice vectors given in a matrix where every column of the matrix correspond to a lattice vector.


==============================================
The output parameters for **init_vel_lattice**
==============================================

**h_dot_out**  real(8), dimension (3,3) velocity of the lattice vectors given in a matrix where every column of the matrix correspond to a lattice vector.