Orientation of DEVC for INSIDE WALL TEMPERATURE
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rakeshra...@gmail.com
May 25, 2018, 2:04:43 AM5/25/18
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Hello everyone!
I have a container made up of copper which is filled with water. I have to measure the time history of the temperature of water in the vessel when the vessel is placed on a stove. I gave DEVC with INSIDE WALL TEMPERATURE at various locations in the water. But the front and the back sides are showing the same temperature and the region in between is showing ambient temperature. I am unable the understand how to orient the DEVC even after reading the manual.
Can anyone help me regarding this?
Thank you.
Regards,
Rakesh
fde
May 25, 2018, 2:21:42 AM5/25/18
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Default of BACKING parameter is 'EXPOSED'. (18.27.SURF)
IF your OBST is one or zero cell thick, maybe this causes this.
Orientation of DEVC for inside wall temp should be normal to the surface.
Rakesh Ranga
May 25, 2018, 4:11:53 AM5/25/18
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Does FRONT side refer to that face facing the +ve direction? And from what I comprehended, the DEVC for INSIDE WALL TEMPERATURE should always be on the FRONT face. Is it right?
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fde
May 25, 2018, 4:28:48 AM5/25/18
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You can place DEVC onto any face of the object. Calculated inside wall temperature will be based on SURF_ID that belongs to that particular face.
An example for placement:
&OBST ID='Obstruction', XB=0.65,1.0, 0.35,0.65, 0.25,0.3/
&DEVC ID='25mm', DEPTH=0.025, QUANTITY='INSIDE WALL TEMPERATURE', XYZ=0.82,0.49,0.25, IOR=-3/
On Friday, May 25, 2018 at 10:11:53 AM UTC+2, Rakesh Ranga wrote:
Does FRONT side refer to that face facing the +ve direction? And from what I comprehended, the DEVC for INSIDE WALL TEMPERATURE should always be on the FRONT face. Is it right?
On Fri, May 25, 2018 at 11:51 AM, fde <yilmaz....@gmail.com> wrote:
Default of BACKING parameter is 'EXPOSED'. (18.27.SURF)IF your OBST is one or zero cell thick, maybe this causes this.Orientation of DEVC for inside wall temp should be normal to the surface.
On Friday, May 25, 2018 at 8:04:43 AM UTC+2, rakeshra...@gmail.com wrote:Hello everyone!I have a container made up of copper which is filled with water. I have to measure the time history of the temperature of water in the vessel when the vessel is placed on a stove. I gave DEVC with INSIDE WALL TEMPERATURE at various locations in the water. But the front and the back sides are showing the same temperature and the region in between is showing ambient temperature. I am unable the understand how to orient the DEVC even after reading the manual.Can anyone help me regarding this?Thank you.Regards,Rakesh
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dr_jfloyd
May 25, 2018, 7:25:42 AM5/25/18
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Since FDS is not going to model convection inside the pot, how good do you think your temperature history will be?
Rakesh Ranga
May 25, 2018, 8:50:37 AM5/25/18
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I completely forgot about that.
Wouldn't it solve a 1d heat transfer through the obstruction considering it as a solid?
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Rakesh Ranga
May 25, 2018, 8:55:03 AM5/25/18
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Only if I mention BOILING_TEMPERATURE, it will consider as liquid right? Instead, I will give it as reference temperature and the HEAT_OF_REACTION as the enthalpy of vaporization. Won't this work?
Randy McDermott
May 25, 2018, 8:59:30 AM5/25/18
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This is probably your best bet---Sikanen and Hostikka's paper on modeling in-depth heat transfer in liquid pool fires.
On Fri, May 25, 2018 at 8:54 AM, Rakesh Ranga <rakeshra...@gmail.com> wrote:
Only if I mention BOILING_TEMPERATURE, it will consider as liquid right? Instead, I will give it as reference temperature and the HEAT_OF_REACTION as the enthalpy of vaporization. Won't this work?
On Fri 25 May, 2018, 18:20 Rakesh Ranga, <rakeshra...@gmail.com> wrote:
I completely forgot about that.Wouldn't it solve a 1d heat transfer through the obstruction considering it as a solid?
On Fri 25 May, 2018, 16:55 dr_jfloyd, <drjf...@gmail.com> wrote:
Since FDS is not going to model convection inside the pot, how good do you think your temperature history will be?--
On Friday, May 25, 2018 at 2:04:43 AM UTC-4, rakeshra...@gmail.com wrote:Hello everyone!I have a container made up of copper which is filled with water. I have to measure the time history of the temperature of water in the vessel when the vessel is placed on a stove. I gave DEVC with INSIDE WALL TEMPERATURE at various locations in the water. But the front and the back sides are showing the same temperature and the region in between is showing ambient temperature. I am unable the understand how to orient the DEVC even after reading the manual.Can anyone help me regarding this?Thank you.Regards,Rakesh
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Rakesh Ranga
May 25, 2018, 9:00:32 AM5/25/18
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Even if I do that, the heat transfer from the vessel to the contents is predominantly by convection. I understood my mistake. Sorry!!!
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