Material properties

[Anonymous]

is it possible to alter the material properties in the library with reference to material hardness, UTS etc. etc.

for example, it allows me to change thermal conductivity properties of the material in the edit function however there does not appear to be an option to alter tensile strength and surface hardness.

I have recently performed an erosion study of the pipe system and the results are extremely unfavourable, i'm just wondering if these parameters may be the issue

thanks

[Jon.Wilde]

Hi Trevor,

There is no option for this in CFD, no. The erosion study is really only an indication of where this might occur, it would not actually demonstrate how much erosion there was.

Happy to help further if you need any help, it sounds like something might be wrong with the results?

Thanks,

Jon

[Anonymous]

yes, the results seem to be quite extreme with regards to the erosion rate on the pipe wall.

I,ve plotted on an X,Y graph the most severe erosion areas on 5 separate designs and placed them into a comparison graph.

I then used the data from the erosion study to estimate the operational life of each piece.

analysis of the results show severe erosion on all but 1 design and I am wondering if the results are accurate or not.

attached is the data  from the studies, graphs and all 5 designs

the parameters are as follows

Materials: Surface material: stainless steel 304, Flow volume: air

Boundary conditions: Velocity 20 m/s (inlet), Pressure 0 bar (outlet)

Particle Tracing was applied and the following properties were applied to the mass

density 13000kg/m3

particle size 0.05mm

coefficient of restitution 0.5

time step size: 4.98828e-05

initial path

magnitude: 20m/s

vector: 0,0,-1

Gravity:

enabled gravity for mass particles

earth unit vector: 0,0,1

erosion updated

the material properties are that of a tungsten carbide cobalt powder that is pneumatically conveyed through a 50mm round pipe (current state).

designs to the pipe must be altered to allow optical sensors to be housed on the side of the pipe to monitor the materials. the side walls of the new design must be flat to reduced the distance between the optical light source and analyser and allow easy mounting of sensors to external pipe wall.

due to the abrasive nature of the material I was hoping to perform an accurate erosion study of the pipe wall to estimate its life expectancy.

I have acquired data from the erosion study which is attached along with the necessary files, drawings and graphs.

any assistance would be appreciated.

thx jon

[Anonymous]

apologies I have attached the wrong graph

please find attached