modeling vaporization droplet

iqbal1990 · March 18, 2014, 10:11

hi.. i am doing droplet vaporization problem in a cylinder chamber.. the problem is, i cant generate the surface and volume mesh.. it says that No surface representation marked as starting surface.. N then, i really not really know how to run this simulation.. i am really2 need ur guys helps as the submission of my final year project is coming soon, but i am stuck with this starccm+ software.. do emel me if u have any idea.. smi90_trg@yahoo.com.my.. the picture of my image is like in the file attach.. starccm.jpg

me3840 · March 19, 2014, 14:16

Clear your mesh and then click the initialize mesh button.

iqbal1990 · March 19, 2014, 22:49

i had done so, but it says there is no mesh to be cleared.. and then, when i try to generate surface or volume mesh again, it says One or more volume of interest failed. How can i fix this problem?

me3840 · March 20, 2014, 08:44

Check your definition of the volume of interest for the surface wrapper, there's something up with it.

iqbal1990 · March 20, 2014, 10:13

how should i define it? sorry, i am pretty new in satrccm world, yet, my supervisor asks me to use it..

can u give me your emel? maybe i can give u the progress that i had done, if u willing to help me..

me3840 · March 20, 2014, 11:21

I would rather keep the conversation here so that others can look at the solution too.

What is your geometry? It looks like you just have a simple cylinder. Why does this need to be wrapped? Give some information on the case.

iqbal1990 · March 24, 2014, 02:41

yup.. thats my geometry.. i also doesnt know whether the geometry should be wrapped or not, but whenever i try to generate the mesh, the error come out.. In my simulation, the quartz holds on a tiny droplet of alcohol in the cylinder. I wants to heat up the cylinder atmosphere so that the droplet will be vaporize eventually.. But for the first things, the mesh cant be generated.. Therefore, i cant do further works

me3840 · March 24, 2014, 10:02

Well is it just a cylinder or are there other parts too? I see other parts in the model, but they don't look like they're in your image so I'm not sure what they are.

iqbal1990 · March 25, 2014, 03:39

there is other parts too sir.. if u can see, in the cylinder, the is quartz fibre that is holding a droplet of alcohol at the end of it.. i try to send u a closure up image...

ping · March 25, 2014, 09:22

test by simplifying your geometry - eg get rid of the other parts and try meshing just a cylinder.
sounds like you need to do a boolean subtraction of the parts before meshing anyway to end up with just one closed volume part to mesh.

iqbal1990 · March 26, 2014, 02:19

so, i need to separate the other parts? for your information, there are 3 parts in my geometry. the cylinder atmosphere which i define as pure nitrogen, the fibre that holds the droplet, which is a quartz and the droplet itself that is hanging at the tip of the quartz fibre which is an alcohol.. this simulation is mainly based on free-fall droplet vaporization. And for my second questions,how do i do the boolean subtraction of the parts? thank you sir

ping · March 26, 2014, 09:13

simplify the geometry and physics and get this running first then slowly add features.

do some tutorials and read the help to learn about part operations which include boolean.

and if your cad was drawn in 3d-cad then do the boolean stuff up there - a better way to get the cad right if you have done it that way

March 18, 2014, 10:11	modeling vaporization droplet	#1
iqbal1990 New Member iqbal Join Date: Mar 2014 Posts: 7 Rep Power: 12	hi.. i am doing droplet vaporization problem in a cylinder chamber.. the problem is, i cant generate the surface and volume mesh.. it says that No surface representation marked as starting surface.. N then, i really not really know how to run this simulation.. i am really2 need ur guys helps as the submission of my final year project is coming soon, but i am stuck with this starccm+ software.. do emel me if u have any idea.. smi90_trg@yahoo.com.my.. the picture of my image is like in the file attach.. starccm.jpg

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March 19, 2014, 14:16		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	Clear your mesh and then click the initialize mesh button.

March 19, 2014, 22:49		#3
iqbal1990 New Member iqbal Join Date: Mar 2014 Posts: 7 Rep Power: 12	i had done so, but it says there is no mesh to be cleared.. and then, when i try to generate surface or volume mesh again, it says One or more volume of interest failed. How can i fix this problem?

March 20, 2014, 08:44		#4
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	Check your definition of the volume of interest for the surface wrapper, there's something up with it.

March 20, 2014, 10:13		#5
iqbal1990 New Member iqbal Join Date: Mar 2014 Posts: 7 Rep Power: 12	how should i define it? sorry, i am pretty new in satrccm world, yet, my supervisor asks me to use it.. can u give me your emel? maybe i can give u the progress that i had done, if u willing to help me..

March 20, 2014, 11:21		#6
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	I would rather keep the conversation here so that others can look at the solution too. What is your geometry? It looks like you just have a simple cylinder. Why does this need to be wrapped? Give some information on the case.

March 24, 2014, 02:41		#7
iqbal1990 New Member iqbal Join Date: Mar 2014 Posts: 7 Rep Power: 12	yup.. thats my geometry.. i also doesnt know whether the geometry should be wrapped or not, but whenever i try to generate the mesh, the error come out.. In my simulation, the quartz holds on a tiny droplet of alcohol in the cylinder. I wants to heat up the cylinder atmosphere so that the droplet will be vaporize eventually.. But for the first things, the mesh cant be generated.. Therefore, i cant do further works

March 24, 2014, 10:02		#8
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	Well is it just a cylinder or are there other parts too? I see other parts in the model, but they don't look like they're in your image so I'm not sure what they are.

March 25, 2014, 09:22		#10
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	test by simplifying your geometry - eg get rid of the other parts and try meshing just a cylinder. sounds like you need to do a boolean subtraction of the parts before meshing anyway to end up with just one closed volume part to mesh.

March 26, 2014, 02:19		#11
iqbal1990 New Member iqbal Join Date: Mar 2014 Posts: 7 Rep Power: 12	so, i need to separate the other parts? for your information, there are 3 parts in my geometry. the cylinder atmosphere which i define as pure nitrogen, the fibre that holds the droplet, which is a quartz and the droplet itself that is hanging at the tip of the quartz fibre which is an alcohol.. this simulation is mainly based on free-fall droplet vaporization. And for my second questions,how do i do the boolean subtraction of the parts? thank you sir

March 26, 2014, 09:13		#12
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	simplify the geometry and physics and get this running first then slowly add features. do some tutorials and read the help to learn about part operations which include boolean. and if your cad was drawn in 3d-cad then do the boolean stuff up there - a better way to get the cad right if you have done it that way