Learning Forum

[nick5990]

Currently I'm using Granta Edupak 2020 (v20.1.0) supplied by the OU

I could not find properties for either Permeability (Water) & Porosity in the stated version currently.

Wikipedia links for info:

https://en.wikipedia.org/wiki/Permeability_(Earth_sciences)

https://en.wikipedia.org/wiki/Porosity

I am looking for creating an Ashby chart for material groups based on these two properties. 

This is for research into net-zero solutions for a potential project as part of OU module T317.

Can you advise how best I can obtain suitable information via Granta Edupak?

[Nick Stefani]

You can find some information on porosity for certain material families for which this property is particularly important such as Foams and Honeycombs (please see the property relative density in material records for foams and honeycombs in Level 3 within the Hybrids folder). However, for these material families, the only information that we can somewhat relate to permeability is Water Absorption (Weight gain (%) after a sample of test material is immersed in distilled water at room temperature for a specified period).
On the other hand, you can find the properties Permeability (02), and Water Vapor Transmission ( the volume of water vapor that will pass through a unit thickness of material per unit area per unit time per unit barometric pressure )in multiple materials in the Architecture database or in the Polymer material family in the core level 3 database.
If have already access to the data, you can use the Add Records tool, to insert records in Edupack and then plot them in a chart with the Chart/Select tool.
I hope this helps.

[David Mercier]

Hi Nick In terms of porosity question, you can estimate some properties of architectured materials with porosity (relative density) as a parameter. Below a screenshot of the Synthesizer tool in EduPack (advanced levels only) that allows you to do such estimations. You can find more about Synthesizer in the discussion below. By the way, porosity is not really a material property, but more a microstructural parameter like the grain size in metals or the crosslinking rate in polymers...

[nick5990]

NickS & dmercier - thank you for the initial information.
I suppose I need to clarify / provide further information in what I was thinking of.
I took the idea of tarmac, bricks, and grass & soil on people's drives in UK, and would like to know the properties & parameters that would need to be considered for liquid absorption (eg water, rainwater, muddy water, sewage), retention, and ability of liquids to pass thorough. I thought from the 2 wikipedia articles stated that this may be permeability (water) and porosity, before your posts.
Also drives would need to be able to support vehicles, pedestrians - so amount of loading before deformation, and strength would be a consideration I think.
I'ld be willing to consider foams & honeycombs, but initially I am looking for ways of comparing broader family groups of materials for the above.
Then a secondary ideal consideration is then looking at the amount of carbon involved in the material groups, and also their manufacture
In light of this further information I would be interested in properties and parameters in Granta Edupak for stated version you'ld suggest.
I don't currently have any data, so would be starting from scratch / software / online resources / published sources etc.

[David Mercier]

Hi You can find such data for some materials (eg bricks), and set such properties as a limit in the Architecture database. But I don't think there is anything about the quality or the type of water (rain, muddy or sewage...).

[nick5990]

Ok thanks
What journals, sites & others would you suggest for searching for to try to get data for broad material groups on absorption and porosity of water related liquids?

[David Mercier]

I believe that papers may help you:
https://www.sciencedirect.com/science/article/abs/pii/0360132387900448
https://www.sciencedirect.com/science/article/abs/pii/S0360132314004089
But you can find maybe some solutions to your question regarding simulation related questions: