Star ccm+ and star cd

shaoyikai813 · March 16, 2015, 14:53

Hello everyone. I know it has been asked so many time about the difference between CCM+ and CD. However, I have did research and couldnt find answers for my questions. I am a uni student doing engine project. I have limited time and never used star ccm+ or star CD before (I used ANSYS). Therefore, I think its better to make sure pick the right one before I learn it. Ok. My question is:

will Star CCM+ able to do both steady simulation and unsteady simulation (moving piston and inlet valve) of engine inlet system and give results of tumble number (tumble energy, tumble momentum, tumble ratio etc). Also will it able to simulate fuel droplet under steady condition?

From research, people said the CCM+ is easier to use but it is not powerful as CD? Star CD is able to simulate combustion flame. (I dont need this for my project). Also some said CCM+ may has difficulty of moving mesh. It is not able to incease or reduce the number of element. are they right?

Thank you very much.

fluid23 · March 16, 2015, 15:31

Star-CD is a legacy code. I am not sure if they even still sell it, they support it. But I am not sure about sales. Star-CCM+ is the way to go. It was basically a re-design from the ground up of Star-CD aimed at integrating all the best and latest techniques with user friendly interface and a single file (as opposed to sperate mesh, results, etc...)

Use star-ccm+.

shaoyikai813 · March 16, 2015, 18:22

Quote:

Originally Posted by MBdonCFD

Star-CD is a legacy code. I am not sure if they even still sell it, they support it. But I am not sure about sales. Star-CCM+ is the way to go. It was basically a re-design from the ground up of Star-CD aimed at integrating all the best and latest techniques with user friendly interface and a single file (as opposed to sperate mesh, results, etc...)

Use star-ccm+.

Hi, thanks for reply. I have heard samething. But I also heard they have newer version of Star CD still coming out. Also Star CD still more powerful than CCM+

fluid23 · March 16, 2015, 22:28

Are you sure about that? What can it do that ccm cannot? I'm not saying you are wrong, I just have never heard anyone claim that.

shaoyikai813 · March 17, 2015, 06:15

Quote:

Originally Posted by MBdonCFD

Are you sure about that? What can it do that ccm cannot? I'm not saying you are wrong, I just have never heard anyone claim that.

I am not sure, this from some radom research. I dont know those software. But if you look the compares website. The still have Star CD on it. I mean if star ccm+ is able to do what I want, it will be great, because looks like it is much easier to use than star CD.

fluid23 · March 17, 2015, 09:18

CCM is the way to go. Their overset mesh method is one of the best options available for moving mesh. I am pretty sure if you called CD-Adapco and told them what you are trying to do that they would try to sell you Star-CCM+ and never even mention Star-CD. I am about 95% sure the only reason they show it on their website is becauset they still support it. They may release bug fixes or minor changes for people still using it, but I think almost of their R&D goes in CCM. In industry, it is widely accepted as one of the best (if not THE best) CFD software. Some research codes do better, but are more or less application specific or very difficult to use.

shaoyikai813 · March 17, 2015, 15:00

Quote:

Originally Posted by MBdonCFD

CCM is the way to go. Their overset mesh method is one of the best options available for moving mesh. I am pretty sure if you called CD-Adapco and told them what you are trying to do that they would try to sell you Star-CCM+ and never even mention Star-CD. I am about 95% sure the only reason they show it on their website is becauset they still support it. They may release bug fixes or minor changes for people still using it, but I think almost of their R&D goes in CCM. In industry, it is widely accepted as one of the best (if not THE best) CFD software. Some research codes do better, but are more or less application specific or very difficult to use.

ok. thank you for help

Paulh · March 20, 2015, 14:45

ES-ICE, which is STAR-CD v4 based, is still CD-adapco's solution to simulating In-Cylinder problems. I'm not sure about this, but I think most of the physics from STAR-CD have been pushed into CCM+ but not all of the mesh motion capability.

shaoyikai813 · March 23, 2015, 17:08

Quote:

Originally Posted by Paulh

ES-ICE, which is STAR-CD v4 based, is still CD-adapco's solution to simulating In-Cylinder problems. I'm not sure about this, but I think most of the physics from STAR-CD have been pushed into CCM+ but not all of the mesh motion capability.

I will try star CCM+ anyway, see what will be.

ggulgulia · March 25, 2015, 06:32

with the latest version of STAR CCM+ (V.9 or V.10) you can simulate moving mesh via overset mesh. However as mentioned by you, STAR CCM+ cannot adapt the mesh based on the motion profile of engine components, which I do not think is a drawback in CCM+, given the power to simulate various physics. The 10the version of the CCM+ has come up with an upgrade where you can simulate the lagrangian phase, vof, droplets all together simultaneously, which is a big plus for mulitphase flow problems. Moreover the overset mesh from v9 onwards overcomes most of the challenges posed in simulating the piston-cylinder motion

With most of the physics features in CCM+ , you can capture the engine motion. I have seen a wankle engine motion simulation in CCM+ at CD-adapco office in India, while I was interning there

March 16, 2015, 14:53	Star ccm+ and star cd	#1
shaoyikai813 New Member yikai shao Join Date: Mar 2015 Posts: 15 Rep Power: 11	Hello everyone. I know it has been asked so many time about the difference between CCM+ and CD. However, I have did research and couldnt find answers for my questions. I am a uni student doing engine project. I have limited time and never used star ccm+ or star CD before (I used ANSYS). Therefore, I think its better to make sure pick the right one before I learn it. Ok. My question is: will Star CCM+ able to do both steady simulation and unsteady simulation (moving piston and inlet valve) of engine inlet system and give results of tumble number (tumble energy, tumble momentum, tumble ratio etc). Also will it able to simulate fuel droplet under steady condition? From research, people said the CCM+ is easier to use but it is not powerful as CD? Star CD is able to simulate combustion flame. (I dont need this for my project). Also some said CCM+ may has difficulty of moving mesh. It is not able to incease or reduce the number of element. are they right? Thank you very much.

March 20, 2015, 14:45	Es-ice	#8
Paulh Member Paul Hancock Join Date: Mar 2009 Location: Bellingham, WA Posts: 31 Rep Power: 17	ES-ICE, which is STAR-CD v4 based, is still CD-adapco's solution to simulating In-Cylinder problems. I'm not sure about this, but I think most of the physics from STAR-CD have been pushed into CCM+ but not all of the mesh motion capability.

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March 16, 2015, 15:31		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	Star-CD is a legacy code. I am not sure if they even still sell it, they support it. But I am not sure about sales. Star-CCM+ is the way to go. It was basically a re-design from the ground up of Star-CD aimed at integrating all the best and latest techniques with user friendly interface and a single file (as opposed to sperate mesh, results, etc...) Use star-ccm+.

March 16, 2015, 22:28		#4
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	Are you sure about that? What can it do that ccm cannot? I'm not saying you are wrong, I just have never heard anyone claim that.

March 17, 2015, 09:18		#6
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	CCM is the way to go. Their overset mesh method is one of the best options available for moving mesh. I am pretty sure if you called CD-Adapco and told them what you are trying to do that they would try to sell you Star-CCM+ and never even mention Star-CD. I am about 95% sure the only reason they show it on their website is becauset they still support it. They may release bug fixes or minor changes for people still using it, but I think almost of their R&D goes in CCM. In industry, it is widely accepted as one of the best (if not THE best) CFD software. Some research codes do better, but are more or less application specific or very difficult to use.

March 25, 2015, 06:32		#10
ggulgulia Senior Member Gajendra Gulgulia Join Date: Apr 2013 Location: Munich Posts: 144 Rep Power: 13	with the latest version of STAR CCM+ (V.9 or V.10) you can simulate moving mesh via overset mesh. However as mentioned by you, STAR CCM+ cannot adapt the mesh based on the motion profile of engine components, which I do not think is a drawback in CCM+, given the power to simulate various physics. The 10the version of the CCM+ has come up with an upgrade where you can simulate the lagrangian phase, vof, droplets all together simultaneously, which is a big plus for mulitphase flow problems. Moreover the overset mesh from v9 onwards overcomes most of the challenges posed in simulating the piston-cylinder motion With most of the physics features in CCM+ , you can capture the engine motion. I have seen a wankle engine motion simulation in CCM+ at CD-adapco office in India, while I was interning there