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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: ghorrocks

Forum: CFX February 29, 2016, 16:43

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks Run the simulation again, but this time include... Run the simulation again, but this time include the equation residuals and produce an output file just before it crashes. Then have a look in the post processor for where the region of high residuals...

Forum: CFX February 28, 2016, 16:50

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks Are you sure you have that right? Why is the... Are you sure you have that right? Why is the inlet using cylindrical coordinates to define the inlet flow when it is a linear blade cascade? Does it converge when you run it entirely in cartesian...

Forum: CFX February 27, 2016, 03:26

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks You have some translational periodic interfaces.... You have some translational periodic interfaces. What are they doing? This seems unusual in a rotating machine simulation. Can you show your domain so I know where these periodic interfaces are...

Forum: CFX February 26, 2016, 05:39

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks Don't use Courant number as a guide. As I said,... Don't use Courant number as a guide. As I said, Courant number does not have a major effect on implicit solvers. Use convergence and accuracy considerations instead.

Forum: CFX February 26, 2016, 04:57

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks Courant number is just about irrelevant for... Courant number is just about irrelevant for steady state analysis. CFX is an implicit solver and does not have a Courant number requirement like explicit codes do. So you use the largest time step...

Forum: CFX October 9, 2013, 05:39

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks Ummm - did you read the FAQ link I posted? The... Ummm - did you read the FAQ link I posted? The only difference for a transient simulation is you decrease the actual timestep size rather than the pseudo timestep size. Other than that it is all the...

Forum: CFX September 30, 2013, 18:21

Replies: 21 Fatal overflow in linear solver Views: 9,220 Posted By ghorrocks This is an FAQ:... This is an FAQ: http://www.cfd-online.com/Wiki/Ansys_FAQ#I_get_the_error_.22Floating_point_exception:_Overflow.22._What_does_this_mean_and_what_do_I_do_about_it.3F

Showing results 1 to 7 of 7

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