porosity Definition and 14 Threads

If you were estimating porosity from velocity, which approach would you prefer to use among Wyllie time-average equation, Gardner's equation Or RHG Equation, when and why? My answer is RHG equation as wylllie equation don't work for unconsolidate sand and give accurate results when it is...

Homework Statement A 3 wt% HF / 12 wt% HCL treatment is injected without an HCL preflush into a sandstone reservoir containing 10% CaCO3. If half of the HF is consumed in reaction with CaCO3 to form CaF2, what will be the next porosity change, considering both CaCO3 dissolution and CaF2...

Is it possible to switch the porosity of any microporous material by external stimuli (eg. optical, pressure or electrical ). I'm trying to imagine something akin to an "Artificial Stomata" where the pore opening & closing Can be externally controlled. I'd be very thankful if someone could...

Homework Statement This should be a pretty simple question but I can't find a straight answer in the literature. I want to simulate a 3D model of a metal foam by starting with an aluminum block and filling it with randomly placed spherical holes of constant volume. The foam should have a...

Hi, I would kindly appreciate it if someone could help me with my simulation problem. I am trying to simulate dual porosity in coal and the interaction of coal matrix and fracture flow. The problem I'm having is I can't assign separate domains with different pressures for matrix and fracture in...

If you have a large collection of hard sphere's and drop them into a bucket, then shook the bucket, would the sphere's rearrange themselves into a more tightly packed state i.e. lower porosity.

how to measure porosity, porosity factor and void factor of a solid mixture?

Hi all, We have a bearing pad at work that failed a porosity test and could not hold pressure (this was the pad itself and not the babbit surface). I need to look into some NDT testing that will give us an idea about the porosity. I have googled and some sites say different things, from...

I woke up this morning to find a strong smell of sewer gas in our basement. The smell is gone now. However, I do not know where the exact source is coming from. We had this same issue before with one of the pipes in our basement that runs through the floor and connects to the outgoing...

I understand the different ways that pores may be formed in a metal, however what i want to know is how it affects the properties of the metal. Am i right in thinking that it would increase the fatigue of the metal, since a large scale of porosity would make the metal more prone to crack formation?

The standard way to measure porosity of a rock is to get the pores completely saturated with water, then weigh the rock immersed in water and again in air (there are modified balances for this). Using Archimedes' principle, you then can determine the volume of the rock. Then you dry the rock...

Hello all of you! I am new in here. I am working on a project in water purification. I need to know if there is any solid in natural state or artificially made, non toxic, with porosity near 1 nano-meters. I need to use it for final phase of purification, the reversed osmosys process. I know...

In one of my classes, we were talking about density measurement and one of the questions that came up was "how does porosity effect density measurement?" I understand that air fills the gaps in the material that is being measured. So is the answer to the question: because air, for example, is...