def HTML_Desc(Title, Description, file):
    """
    Write model description in html file.

    :param Title: simulation title (analysis model)
    :type Title : str
    :param Description: model description
    :type Description : str
    :param file: html file object
    :type file : file object
    :return: None
    """
    file.write('<h2 style="color:#ff7600;">What is ' + Title + ' ?</h2>\n')
    file.write('<p style = "text-align:justify;margin:15px;">' +
        Description + '</p>\n')
