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Forum: FLUENT October 22, 2012, 14:43
Replies: 12
Views: 2,964
Posted By mike2
after many changes the proble is the same, if in...

after many changes the proble is the same, if in fluent i consider both volumes , air and water liquid, i have reverse flow at mass flow inlet.if i consider only the volume of water with mass flow...
Forum: FLUENT October 18, 2012, 09:20
Replies: 12
Views: 2,964
Posted By mike2
i have to change BC. for wather BC are mass flow...

i have to change BC. for wather BC are mass flow inlet and outflow, for air i have a problem i can use wall T=1073 k but can't use pressoure outlet.Which BC can i use?
Forum: FLUENT October 16, 2012, 16:48
Replies: 12
Views: 2,964
Posted By mike2
the flow is turbolent k and epsilon standard...

the flow is turbolent k and epsilon standard model, the mesh i thik is well done, about residual they are continuity, x, y, z velocity, k and epsilon. energy and DO are under 10e-6
Forum: FLUENT October 16, 2012, 16:28
Replies: 12
Views: 2,964
Posted By mike2
i have not experimental results but i dont' think...

i have not experimental results but i dont' think that the field of temperature is real becouse the residuals don't go down. after 10000 iterations they are in the range between 10e-2 and 10e-3 i...
Forum: FLUENT October 16, 2012, 15:55
Replies: 12
Views: 2,964
Posted By mike2
one metre

one metre
Forum: FLUENT October 16, 2012, 05:51
Replies: 12
Views: 2,964
Posted By mike2
in this case have i to use vof model? or is it...

in this case have i to use vof model? or is it useless?
Forum: FLUENT October 14, 2012, 15:16
Replies: 12
Views: 2,964
Posted By mike2
yes, specified the same mass flow at pressure...

yes, specified the same mass flow at pressure outlet, but after 250 iterations inlet mass flow is 0.01 kg/s, outlet is 0.015 kg/s. i know that with more iterations the mass flow became the same, but...
Forum: FLUENT October 14, 2012, 08:42
Replies: 12
Views: 2,964
Posted By mike2
boundary conditions for heat exchanger

hi to everyone, i have a problem with boundary conditions for heat exchanger with coaxial pipes, in the inner pipe there is air, in the external there is water liquid. for two sides of inner pipe...
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