movement of bed river soil

ashakn · October 29, 2011, 17:14

hi friends
i am working about movement of soil particles from bed river when water flows with high velocity in river.
how can i define this soil of bed river to simulate this movement??
i am really confused. any body know that?

thanks a lot
ashkan

ghorrocks · October 30, 2011, 05:31

Do you want to include scouring of a bed of soil and/or deposition of the soil to form new shoals? Or just the motion of the soil in the moving water?

ashakn · October 30, 2011, 07:35

hi ghorrocks
i want to simulate scouring of a bed around bridge pier. i dont know how can i do that in cfx.

ghorrocks · October 30, 2011, 17:05

CFX cannot simulate scouring directly. It does not have a physical model built into it to handle this. You may be able to use the fluidised bed models but I doubt it as it was not developed for this purpose.

The best approach would be to either couple CFX with a DEM model such as EDEM, or to use a different CFD code with scouring models built in.

ashakn · October 30, 2011, 19:18

thanks my friend
you helped me. i have another question. how can i define the 35 minutes time for my simulation? i want to see the differences between simulating in 2th minute and in 15th and 35th minutes. so how can i simulate for 35 min and then extract 2th and 15th min from that simulation?

October 29, 2011, 17:14	movement of bed river soil	#1
ashakn New Member ashkan Join Date: Oct 2011 Posts: 6 Rep Power: 15	hi friends i am working about movement of soil particles from bed river when water flows with high velocity in river. how can i define this soil of bed river to simulate this movement?? i am really confused. any body know that? thanks a lot ashkan

October 30, 2011, 19:18	define time	#5
ashakn New Member ashkan Join Date: Oct 2011 Posts: 6 Rep Power: 15	thanks my friend you helped me. i have another question. how can i define the 35 minutes time for my simulation? i want to see the differences between simulating in 2th minute and in 15th and 35th minutes. so how can i simulate for 35 min and then extract 2th and 15th min from that simulation?

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October 30, 2011, 05:31		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	Do you want to include scouring of a bed of soil and/or deposition of the soil to form new shoals? Or just the motion of the soil in the moving water?

October 30, 2011, 07:35		#3
ashakn New Member ashkan Join Date: Oct 2011 Posts: 6 Rep Power: 15	hi ghorrocks i want to simulate scouring of a bed around bridge pier. i dont know how can i do that in cfx.

October 30, 2011, 17:05		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,872 Rep Power: 144	CFX cannot simulate scouring directly. It does not have a physical model built into it to handle this. You may be able to use the fluidised bed models but I doubt it as it was not developed for this purpose. The best approach would be to either couple CFX with a DEM model such as EDEM, or to use a different CFD code with scouring models built in.