Jump to content

Looking for fluid mixing results I can verify


Pádraig

Recommended Posts

Hi all,

 

I have a mixing simulation drawn up on the programme Ansys, where I am mixing two fluids. I want to verify my mixing process, by using this process to mix two other materials and take a variable of each material (e.g. viscosity) and compare the actual final mixing value to the one that I get when I mix them in my simulaiton.

 

Is there a paper, site, or other available resource that contains mixing data for any two fluids?

Link to comment
Share on other sites

2 hours ago, Pádraig said:

I have a mixing simulation drawn up on the programme Ansys, where I am mixing two fluids. I want to verify my mixing process, by using this process to mix two other materials and take a variable of each material (e.g. viscosity) and compare the actual final mixing value to the one that I get when I mix them in my simulaiton.

Is there a paper, site, or other available resource that contains mixing data for any two fluids?

There are, but they are usually behind paywalls.

I'd be wary of using viscosity as your parameter. A particularly important viscosity behaviour is that of a binary mixture of water and ethanol. It is highly irregular in certain proportions and certain conditions due to specific interactions between the components. You can get the experimental data easily enough, but then the question is whether Ansys contains an appropriate mixing model for that particular system. Empirical data always trumps predictive modelling. It comes down to what you're exactly trying to achieve.

Could you pick entropy instead? It follows a much more predictable path that's quite simple to calculate. Look for a wikipedia page on Entropy of Mixing. 

 

Link to comment
Share on other sites

On 1/31/2023 at 7:20 PM, sethoflagos said:

There are, but they are usually behind paywalls.

I'd be wary of using viscosity as your parameter. A particularly important viscosity behaviour is that of a binary mixture of water and ethanol. It is highly irregular in certain proportions and certain conditions due to specific interactions between the components. You can get the experimental data easily enough, but then the question is whether Ansys contains an appropriate mixing model for that particular system. Empirical data always trumps predictive modelling. It comes down to what you're exactly trying to achieve.

Could you pick entropy instead? It follows a much more predictable path that's quite simple to calculate. Look for a wikipedia page on Entropy of Mixing. 

 

 

I can do Static Pressure and Pressure Coefficient (both 0) and Absolute Pressure, I couldn't find any setting for Entropy

Link to comment
Share on other sites

On 1/31/2023 at 5:18 PM, Pádraig said:

I want to verify my mixing process,

Option 1) Perform the simulation by long hand calculation - the way we used to do this stuff.

Option 2) Depends on your precise contractual relationship with the software suppliers. 

Edited by sethoflagos
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.