Exact solutions for the problem of drying with coupled phase change in a porous medium with a heat flux condition on x = 0 of the type - q0/ <img border=0 id="_x0000_i1026" src="../../../../../img/revistas/cam/v22n3/a01img01.gif" align=absmiddle>, with q0 > 0, for any value of the Luikov number Lu is obtained. This solution can be only obtained when q0 verifies a certain inequality. Besides, for large Luikov number (more precisely, Lu > <img border=0 id="_x0000_i1027" src="../../../../../img/revistas/cam/v22n3/a01img02.gif" align=absmiddle>), we obtain that the temperature distribution t2 reaches to a minimum value which is smaller than its initial temperature or limit value reached at +<FONT FACE=Symbol>¥</font>.
free boundary; Stefan problem; phase change; drying; heat conduction; mass transfer; porous medium
