Grid In-dependency question

Alia Amer · March 14, 2016, 06:02

HI ALL!!
I am new in this forum and i have a question.... i am using FLOTRAN module of ANSYS 12.0 inorder to study ventilation performance inside hospital wards. my question is regarding the grid independency... can any one give me a simple explanation on what does it mean and how to do it.... Thanks in advance!

fresty · March 14, 2016, 08:16

Hard to believe you couldn't find it in the forum or elsewhere.. anyway, probably the simplest descriptive explanation could be: to reduce the mesh element size (increase grid density) till the solution is independent of further grid resolution... however, it depends on what exactly is the objective of the simulation and the level of accuracy required, both set forth by the user... normally the values of desired variables are compared statistically with previous/ next/ mean/ initial values and the solution is termed grid independent once percentage deviation/ difference is sufficiently reduced..

March 14, 2016, 06:02	Grid In-dependency question	#1
Alia Amer New Member Alia Amer Join Date: Mar 2016 Posts: 13 Rep Power: 10	HI ALL!! I am new in this forum and i have a question.... i am using FLOTRAN module of ANSYS 12.0 inorder to study ventilation performance inside hospital wards. my question is regarding the grid independency... can any one give me a simple explanation on what does it mean and how to do it.... Thanks in advance!

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March 14, 2016, 08:16		#2
fresty Senior Member Join Date: Aug 2014 Location: UK Posts: 213 Rep Power: 12	Hard to believe you couldn't find it in the forum or elsewhere.. anyway, probably the simplest descriptive explanation could be: to reduce the mesh element size (increase grid density) till the solution is independent of further grid resolution... however, it depends on what exactly is the objective of the simulation and the level of accuracy required, both set forth by the user... normally the values of desired variables are compared statistically with previous/ next/ mean/ initial values and the solution is termed grid independent once percentage deviation/ difference is sufficiently reduced..