[hqqicedream]

Hello, everyone! I have a problem in my subject, I need to simulate the working conditions of DMFC(or even special-shaped DMFC),but I have never done that, and there is no people know how to finish it, so I would like to search for help from someone with experiences. Thank you!

Some days ago I tried to finish an example from others, but when iterating errors appeared such as:
iter continuity x-velocity y-velocity z-velocity energy h2 o2 h2o uds-0 uds-1 uds-3 time/iter
V_cell = 0.750000 (V) ... V_open = 0.950000 (V)
I_anode = 0.037519 (A/cm^2) ... I_cathode = 0.037519 (A/cm^2) ... dI_mea = -0.000000 (A/cm^2) ... dI_stk = -0.000000 (A/cm^2)
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
Error: Floating point error: invalid number
Error Object: ()
1 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 1.#QNBe+00 0.0000e+00 16:25:03 199
V_cell = 0.750000 (V) ... V_open = 0.950000 (V)
I_anode = 1.#QNAN0 (A/cm^2) ... I_cathode = 1.#QNAN0 (A/cm^2) ... dI_mea = 1.#QNAN0 (A/cm^2) ... dI_stk = 1.#QNAN0 (A/cm^2)
reversed flow in 100 faces on pressure-outlet 19.
reversed flow in 100 faces on pressure-outlet 20.

I don't know what is the reason, is there anyone knows? Please tell me what should I do to avoid such errors.