"Temperature limited to..." at mass transfer location

andrew-c · April 11, 2023, 19:04

I am simulating water evaporation to still ambient air using species mass transfer. It works fine without the energy equation, but I get strange temperatures when energy is enabled (I need energy on).

The whole domain is initialized at 300 K, pressure inlets/outlets have 300 K specified, and walls have 0 heat flux. Yet, as evaporation occurs, the temperatures at the location of mass transfer start to drop. It starts small, but usually builds to divergence, where I get the "Temperature limited to..." error.

I could understand some evaporative cooling taking place, but I don't think that's what this is (it occurs far too fast, and shows reduced temperatures in the vapor, rather than the liquid).

Images below - Thanks in advance for any suggestions.

2023-04-11 18_02_55-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg

2023-04-11 18_03_12-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg

2023-04-11 18_03_22-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg

Ultimate1234 · August 21, 2023, 10:36

Can you please share your case files, I am new to the topic so it would be very helpful.

April 11, 2023, 19:04	"Temperature limited to..." at mass transfer location	#1
andrew-c New Member Andrew Join Date: Dec 2022 Posts: 29 Rep Power: 4	I am simulating water evaporation to still ambient air using species mass transfer. It works fine without the energy equation, but I get strange temperatures when energy is enabled (I need energy on). The whole domain is initialized at 300 K, pressure inlets/outlets have 300 K specified, and walls have 0 heat flux. Yet, as evaporation occurs, the temperatures at the location of mass transfer start to drop. It starts small, but usually builds to divergence, where I get the "Temperature limited to..." error. I could understand some evaporative cooling taking place, but I don't think that's what this is (it occurs far too fast, and shows reduced temperatures in the vapor, rather than the liquid). Images below - Thanks in advance for any suggestions. 2023-04-11 18_02_55-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg 2023-04-11 18_03_12-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg 2023-04-11 18_03_22-B_Fluid Flow (Fluent) Parallel Fluent@DESKTOP-TTQLM5V [2d, dp, pbns, mixtur.jpg

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August 21, 2023, 10:36		#2
Ultimate1234 New Member Maharghya Dyuti Das Join Date: May 2023 Posts: 15 Rep Power: 3	Can you please share your case files, I am new to the topic so it would be very helpful.