'IdealFluid' Describe Behavior of Matter in Phase State of liquid/gas+

  • #1
Questionable Thought
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One thing about terminology that I think c/should be changed for Continuum Mechanics:

1) 'Ideal Fluid' Describe Behavior of Matter in Phase States of liquid/gas and sometimes Bulk-Solid:

-continually deform under applied shear stress or external force
-usually zero shear modulus
-behavior can further be specified by Constitutive Material model for that fluid, e.g. viscoelasticity


2) 'Ideal Solid' Describe Behavior of Matter in Phase States of Solid and sometimes Liquid:

-usually NON-zero shear modulus
-behavior can further be specified by Constitutive Material model for that solid, e.g. elasticity, plasticity, viscoelasticity
-solid-continua and structure elements

3) Historically, it's understood Solid describes both phase state & matter behavior, whereas Fluid describes matter behavior for variety phase states

-So instead of Solid Mechanics/Dynamics, I think that this term should be updated
-is there more general term instead of solid, as in the same spirit as fluid term? Any suggestions?




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PS, by the way term solid is also used when describing e.g. cylinder that is not hollow, but again solid refers to phase state of matter. Is there more rigorous term than 'solid or un-hollow' to describe object that is not hollow?
 

Answers and Replies

  • #2
Nugatory
Mentor
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One thing about terminology that I think c/should be changed for Continuum Mechanics:
Terminology develops over time and that haphazard development sometimes leads to inconsistencies in usage or the same word being used in different ways in different contexts. You've found one of these.

The terminology may not be optimal, but it it is what it is and there's no way of changing it once it's established. Because there's not much to do here except recognize that the terminology is what it is, this thread is closed.
 
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