Recent content by JD_PM

Nice, thank you! I am not familiar with structs so I will definitely learn from it. Let me share the code I got so far clc close all clear all warning('OFF', 'MATLAB:table:ModifiedAndSavedVarnames') %step 0 Ai = readtable("sampleData10mm.csv"); Bi = readtable("sampleData30mm.csv"); A =...

I am studying a flow going through an orifice. I am aimed at overlapping the plots for the speed distribution over the vertical width profile (which is 0.015 m long; highlighted in red) for two downstream, horizontal distances [w.r.t. the orifice]: 0.01 m and 0.03 m. The result should look...

No worries, your above reply is appreciated :smile: They do, indirectly though. ##R_{c,T}## and ##R_{v,T}## are latent heat source terms. In the paper, they assume they have exactly the same form than the mass transfer Schnerr-Sauer source terms (that is, the coefficients that rule how much...

Hi DrClaude Asking them could work. I understand it's a bit too much to read a paper, my text and then reply. I am planning to post a thread that doesn't require to read any paper beforehand.

Hi guys.Lately I have been posting questions related to paper material and I am getting no replies (here, here and here). I am convinced it's not only due to the difficulty of the topic but the way I am posting it. Should I "go to the point"? Honestly, it's also acceptable that people only...

Let me go more to the point. I would like to understand why the convective heat transfer term is subtracted from the latent heat source term to obtain the total heat transfer. Message to anyone reading: even though you have never dealt with cavitation your input/guess would be useful...

Cavitation is a phenomena that occurs in liquids when the local static pressure drops below the vapor pressure; bubbles form within the liquid. I am studying cavitation in incompressible, two-phase (liquid & gas), homogeneous mixture of cryogenic fluids (liquid nitrogen in particular) within...

The liquid-vapor mass transfer (evaporation and condensation) is governed by the vapor transport equation: $$\frac{\partial}{\partial t} (\alpha_l \rho) + \nabla \cdot (\alpha_l \rho \vec v) = \dot m^{+} + \dot m^{-}$$ In the incompressible flow case (constant density), it reduces to $$...

There are no formulas numbered 23 nor 24. Did you mean 7.4 here?

Just for the record, here's an explanation of the JANAF model Good question, here is the derivation. I am trying to find the coefficients for liquid nitrogen online. However, I think the best I could do is follow the same procedure to derive them (not only for ##c_p## but for the density...

I am trying to find the specific heat (at constant pressure) ##C_p## coefficients linked to the JANAF model, which basically assumes that ##C_p## is a polynomic function of ##T##, for liquid nitrogen (at ##\approx## 97 K). Before doing that, I am trying to find those for water (at ##\approx##...

For the fluid, I will use three conservation laws for mixture quantities (mass, momentum and total energy) and an additional equation for the void ratio (as explained in the paper "Modeling for non isothermal cavitation using 4-equation models"). If you want I can share the explicit equations...

I have a stp file (PF does not support it so I cannot upload it here. If there is a way I can share it please let me know) of an orifice and I want to create a new file where the orifice is fit inside a cylinder. What software do you recommend me to use? Thank you! :)

Thanks. It had to do with patches but in the way I wrote it. Putting a space between patches and () made it work (there wasn't in the code I was running).

Let's give some context. I created a Mesh via snappyHexMesh and next I am setting the boundary conditions (BCs). First I copied the patches folder "createPatchDict" to my system's folder via the command "cp $FOAM_ETC/caseDicts/mesh/manipulation/patches/createPatchDict ./system" Taking into...