|
[Sponsors] |
April 9, 2020, 06:47 |
how to calculate Nusselt nnumber
|
#1 |
New Member
Join Date: Sep 2019
Posts: 9
Rep Power: 7 |
I'm simulating a cooling process of water jet impingement on a hot plate. basically, initial temperature is 750 c , then its cool down due to the impingement of water.
problem description: - constant horizontal hot plate with thickness and 0.2m fluid domain above the plate with interface between the plate and the fluid domain to capture the heat transfer. - inlet velocity - pressure outlet - axisymmetric - transient problem - initial temperature 750 C please, check the attachment photo to ease the description. How can I find the Nusselt number and the heat transfer coefficient at the plate. however, each location of the plate has multiple temperature due to transient simulation. thanks |
|
April 9, 2020, 07:19 |
Setup
|
#2 |
Senior Member
|
Is it a multiphase flow or single phase? And any reason for using interface between solid and fluid or by interface do you mean physical interface and not mesh interface?
Nusselt number is reported directly by Fluent. But you can also heat transfer coefficients based on wall temperature or wall function based equation.
__________________
Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
|
April 9, 2020, 07:57 |
|
#3 |
New Member
Join Date: Sep 2019
Posts: 9
Rep Power: 7 |
the problem is multiphase flow, what do u mean by physical interface. what I did is coupled interface. Can you clarify how to calculate Nusselt number. or maybe can you share links that might help.
thanks |
|
April 9, 2020, 08:14 |
Nusselt Number
|
#4 |
Senior Member
|
Physical interface is what exists between fluid and solid in reality. In CFD terminology, interface is used to define non-conformal interfaces only. If the mesh is conformal, which is recommended until and unless there is a moving mesh being used, then it is called coupled wall.
For Nusselt number, you can just go to Reports > Surface Integrals > Wall Fluxes and report Nusselt Number. You can also plot its contour under Wall Fluxes.
__________________
Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
How can i calculate nusselt number,natural convection in fluent? | sa har | FLUENT | 0 | March 28, 2016 11:17 |
how to calculate nusselt no of water with nitric acid? | umair64 | CFX | 1 | August 26, 2015 19:20 |
calculation of average nusselt number on a heated surface in a lid-driven cavity flow | abhishek.iiest | Main CFD Forum | 0 | June 24, 2015 04:47 |
How to calculate Nusselt number | SeRGeiSarov | Main CFD Forum | 4 | May 6, 2009 01:57 |
how to calculate Nusselt number,in CFX? | prayskyer | CFX | 2 | June 19, 2006 01:24 |