Learning Forum

[DIWAS]

Hello, I am new to ansys fluent, let alone multiphase flow is difficult. I am trying to consider air and snow as a multiphase flow(mixture model), I want to define every condition but I have limited knowledge in ANSYS fluent as well as the User Defined Functions. I got few helps from guides and youtube but right now reaching nowhere. If anyone can help me to accurately simulate the snowdrift accumulation. It would be very helpful. Thankyou.n

[Rob]

in answer to the question, yes we have. Snow drifts and sand dunes. nRead the notes on eulerian multiphase, and have a very careful look on how you'd apply that. n

[DIWAS]

thank you for the reply... My professor wants me to use mixture model, is it possible? I have read about the multiphase flow, Mixture, VOF as well as Eulerian Multiphase. I know the common difference. Should I consider steady or unsteady state simulation?n

[Rob]

Mixture will work, and that's how the snow drifts were done by the Swedes in the early 00s. There was an article published in Fluent News (it's pre-Ansys work) but I don't have a copy and it's unlikely to be on the Ansys website because of it's age. nYou may want to look up some of the work by Bagnold from the 1930s & 40s on sand movement: it's much the same phenomena, just warmer. n

[DrAmine]

Mixture Model can be used with the default slip velocity or an adjusted one modeling snow fall speed. Alternative is to use DPM. n

[Vineet]

hello mate!! I am also trying to solve almost same problem. It would be better if we could have some discussion on the topic.nnThanks in advance.n

[Rob]

if you start by posting where you've got to then everyone can comment. n

[DIWAS]

thank you for the reply... I got a little help from my supervisor... I applied a udf code and did a steady simulation. Now, I want to try dynamic mesh for erosion and deposition.n

[kiran.purushothamakeshavan]

Hi, I'm working on a similar problem, the accumulation of snow on surfaces. It would be great if you could throw some light on the general outline of how you proceeded to generate meaningful results

[DrAmine]

Great!n

[Rob]

Excellent. Remember with moving mesh you can't add or remove surfaces (ie add or remove topology) so you will need to be a bit careful with the initial set up. n