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Water flow in a PVC pipe to measure impact of water pressure on it
Posted 2013年12月15日 GMT-5 12:49 Fluid & Heat, Computational Fluid Dynamics (CFD) Version 4.3b 1 Reply
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Hello,
I'm the beginner of Comsol Multiphysics. I wants to pass water though a PVC pipe. I have used a straight pipe using Turbulent Flow, k-ε. In geometry there are two domain one for water, another one for PVC pipe. Inlet velocity 0.1m/s. Meshing is okay. For better realization I want to attach my .mph file. But I can't . It shows file extension error. During compute in comsol 4.3b, It shows following error info:
Failed to evaluate variable.
- Variable: material.mu
- Geometry: 1
- Domain: 2
Failed to evaluate variable.
- Variable: mod1.spf.mu
- Defined as: material.mu
Failed to evaluate variable.
- Variable: mod1.spf.kinit
- Defined as: (((100*mod1.spf.mu)/(subst(mod1.spf.rho,mod1.spf.fp1.minput_pressure,unit_atm_cf)*mod1.spf.l_mix_lim))^2)
Failed to evaluate expression.
- Expression: mod1.spf.kinit
How can I get rid of these problems?
I'm the beginner of Comsol Multiphysics. I wants to pass water though a PVC pipe. I have used a straight pipe using Turbulent Flow, k-ε. In geometry there are two domain one for water, another one for PVC pipe. Inlet velocity 0.1m/s. Meshing is okay. For better realization I want to attach my .mph file. But I can't . It shows file extension error. During compute in comsol 4.3b, It shows following error info:
Failed to evaluate variable.
- Variable: material.mu
- Geometry: 1
- Domain: 2
Failed to evaluate variable.
- Variable: mod1.spf.mu
- Defined as: material.mu
Failed to evaluate variable.
- Variable: mod1.spf.kinit
- Defined as: (((100*mod1.spf.mu)/(subst(mod1.spf.rho,mod1.spf.fp1.minput_pressure,unit_atm_cf)*mod1.spf.l_mix_lim))^2)
Failed to evaluate expression.
- Expression: mod1.spf.kinit
How can I get rid of these problems?
1 Reply Last Post 2013年12月16日 GMT-5 08:27
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Posted:
1 decade ago
Hi,
Have you checked if the materials are applied to the right domains and if the Turbulent flow physics is referred only to the fluid domain?
--
Marino Miccio
Chemical Engineer
www.youtube.com/ScuolaTech
Have you checked if the materials are applied to the right domains and if the Turbulent flow physics is referred only to the fluid domain?
--
Marino Miccio
Chemical Engineer
www.youtube.com/ScuolaTech