Calculating change in energy at several test points in a geometry

Peta247 · September 5, 2016, 19:50

Hello guys I need help with collecting energy change data over time at several test points in my geometry on CFX-Pre.

I can collect data sure as pressure, density, temperature etc but I can't seem to find an energy option.

Please help.

Regards,

Opaque · September 6, 2016, 11:35

What do you mean by energy ? Which kind of energy ? Thermal, kinetic, mechanical ?

Perhaps you are looking for Static Enthalpy, Total Enthalpy, or similar.

Hope the above helps,

Peta247 · September 6, 2016, 16:13

Quote:

Originally Posted by Opaque

What do you mean by energy ? Which kind of energy ? Thermal, kinetic, mechanical ?

Perhaps you are looking for Static Enthalpy, Total Enthalpy, or similar.

Hope the above helps,

The aim is to calculate the change in thermal energy of a passenger inside a bus after x amount of time

Opaque · September 6, 2016, 18:14

The change in thermal energy only should be proportional to the specific heat capacity and the temperature difference; therefore, delta U = C * (T_2 - T_1).

Hope the above helps,

September 5, 2016, 19:50	Calculating change in energy at several test points in a geometry	#1
Peta247 New Member Nomen Ose Join Date: Jun 2016 Location: Melbourne, Australia Posts: 19 Rep Power: 9	Hello guys I need help with collecting energy change data over time at several test points in my geometry on CFX-Pre. I can collect data sure as pressure, density, temperature etc but I can't seem to find an energy option. Please help. Regards,

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September 6, 2016, 11:35		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	What do you mean by energy ? Which kind of energy ? Thermal, kinetic, mechanical ? Perhaps you are looking for Static Enthalpy, Total Enthalpy, or similar. Hope the above helps,

September 6, 2016, 18:14		#4
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	The change in thermal energy only should be proportional to the specific heat capacity and the temperature difference; therefore, delta U = C * (T_2 - T_1). Hope the above helps,