def foam_header_logo(foam_version, website):
    """ Write the logo part of the OpenFOAM file header.

    Used by :py:meth:`write_field_file`.

    Parameters
    ----------
    foam_version : str
        OpenFOAM version to write in the header.
    website : str
        OpenFOAM website to write in the header.

    Returns
    -------
    header : str
        OpenFOAM file header logo.
    """
    def header_line(str1, str2):
        return f'\n| {str1:<26}| {str2:<48}|'

    header_start = '/*' + '-'*32 + '*- C++ -*' + '-'*34 + '*\\'
    header_end = '\n\\*' + '-'*75 + '*/'
    logo = ['=========',
            r'\\      /  F ield',
            r' \\    /   O peration',
            r'  \\  /    A nd',
            r'   \\/     M anipulation',
            ]
    info = ['',
            'OpenFOAM: The Open Source CFD Toolbox',
            f'Version:  {foam_version}',
            f'Website:  {website}',
            '',
            ]
    # create header
    header = header_start
    for l, i in zip(logo, info):
        header += header_line(l, i)
    header += header_end
    return header