Possible to march backwards in time ?

August 31, 2007, 15:31

Hi. I was just wondering if CFX was capable of marching backwards in time.

I tried to place a negative time step but CFX complained bitterly.

Any help is appreciated.

August 31, 2007, 19:29

Hi,

No, not possible.

Glenn Horrocks

September 3, 2007, 19:14

An interesting question. Transport phenomena are irresversible, you can not simply reverse them without doing additional work. This would be violation of second law of thermodynamics. For example, negative thermal conductivity and negative diffusion coefficient are something similar to negative time-step.

August 31, 2007, 15:31	Possible to march backwards in time ?	#1
Dr. Who Guest Posts: n/a	Hi. I was just wondering if CFX was capable of marching backwards in time. I tried to place a negative time step but CFX complained bitterly. Any help is appreciated.

August 31, 2007, 19:29	Re: Possible to march backwards in time ?	#2
Glenn Horrocks Guest Posts: n/a	Hi, No, not possible. Glenn Horrocks

September 3, 2007, 19:14	Re: Possible to march backwards in time ?	#3
V. Kumar Guest Posts: n/a	An interesting question. Transport phenomena are irresversible, you can not simply reverse them without doing additional work. This would be violation of second law of thermodynamics. For example, negative thermal conductivity and negative diffusion coefficient are something similar to negative time-step.

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