<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Sans Serif'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium;"><span class="Apple-style-span" style="font-family: arial,sans-serif; font-size: 14px;">I am new to PETSc and I am interested to use the nonlinear solver in a CFD code for low speed compressible fluid.<br>
<br>According to some papers, it seems that<span class="Apple-converted-space"> </span>GMRES (or any other Krylov method) could be used to precondition FGMRES in a way that is completely<span class="Apple-converted-space"> </span>matrix-free. Is it something possible with the fgmres implementation<span class="Apple-converted-space"> </span>provided by PETSc ?<span class="Apple-converted-space"></span><br>
<p>Christine<span class="Apple-converted-space"><br></span></p></span></span>