SIST EN ISO 80000-11:2013

SLOVENSKI STANDARD
SIST EN ISO 80000-11:2013
01-junij-2013
1DGRPHãþD
SIST ISO 31-12:1995/Amd. 1:2001
SIST ISO 31-12+A1:2008
9HOLþLQHLQHQRWHGHO=QDþLOQDãWHYLOD,62
Quantities and units - Part 11: Characteristic numbers (ISO 80000-11:2008)
Größen und Einheiten - Teil 11: Kenngrößen der Dimension 1 (ISO 80000-11:2008)
Grandeurs et unités - Partie 11: Nombres caractéristiques (ISO 80000-11:2008)
Ta slovenski standard je istoveten z: EN ISO 80000-11:2013
ICS:
01.060 9HOLþLQHLQHQRWH Quantities and units
SIST EN ISO 80000-11:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 80000-11:2013

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SIST EN ISO 80000-11:2013


EUROPEAN STANDARD
EN ISO 80000-11

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2013
ICS 01.060
English Version
Quantities and units - Part 11: Characteristic numbers (ISO
80000-11:2008)
Grandeurs et unités - Partie 11: Nombres caractéristiques Größen und Einheiten - Teil 11: Kenngrößen der Dimension
(ISO 80000-11:2008) 1 (ISO 80000-11:2008)
This European Standard was approved by CEN on 14 March 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80000-11:2013: E
worldwide for CEN national Members.

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SIST EN ISO 80000-11:2013
EN ISO 80000-11:2013 (E)
Contents Page
Foreword .3

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SIST EN ISO 80000-11:2013
EN ISO 80000-11:2013 (E)
Foreword
The text of ISO 80000-11:2008 has been prepared by Technical Committee ISO/TC 12 “Quantities and units”
of the International Organization for Standardization (ISO) and has been taken over as EN ISO 80000-
11:2013.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2013, and conflicting national standards shall be withdrawn at
the latest by October 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 80000-11:2008 has been approved by CEN as EN ISO 80000-11:2013 without any
modification.

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SIST EN ISO 80000-11:2013

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SIST EN ISO 80000-11:2013
INTERNATIONAL ISO
STANDARD 80000-11
First edition
2008-12-15
Quantities and units —
Part 11:
Characteristic numbers
Grandeurs et unités —
Partie 11: Nombres caractéristiques

Reference number
ISO 80000-11:2008(E)
©
ISO 2008

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SIST EN ISO 80000-11:2013
ISO 80000-11:2008(E)
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©
ii ISO 2008 – All rights reserved

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SIST EN ISO 80000-11:2013
ISO 80000-11:2008(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Names, symbols, and definitions . 1
4 Momentum transport . 2
5 Transport of heat . 4
6 Transport of matter in a binary mixture . 6
7 Constants of matter . 8
8 Magnetohydrodynamics . 9
©
ISO 2008 – All rights reserved iii

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SIST EN ISO 80000-11:2013
ISO 80000-11:2008(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 80000-11 was prepared by Technical Committee ISO/TC 12, Quantities, units, symbols, conversion factors
in co-operation with IEC/TC 25, Quantities and units.
This first edition of ISO80000-11 cancels and replaces the third edition of ISO31-12:1992 and
ISO 31-12:1992/Amd.1:1998. The major technical changes from the previous standard are the following:
— the normative references have been changed.
ISO 80000 consists of the following parts, under the general title Quantities and units:
— Part 1: General
— Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
— Part 3: Space and time
— Part 4: Mechanics
— Part 5: Thermodynamics
— Part 7: Light
— Part 8: Acoustics
— Part 9: Physical chemistry and molecular physics
— Part 10: Atomic and nuclear physics
— Part 11: Characteristic numbers
— Part 12: Solid state physics
IEC 80000 consists of the following parts, under the general title Quantities and units:
— Part 6: Electromagnetism
— Part 13: Information science and technology
— Part 14: Telebiometrics related to human physiology
©
iv ISO 2008 – All rights reserved

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SIST EN ISO 80000-11:2013
ISO 80000-11:2008(E)
Introduction
0.1 Arrangements of the tables
All characteristic numbers are quantities of dimension one. Hence the coherent unit of all characteristic
numbers is the number one, symbol 1. This unit is not repeated in the following tables.
Where the numbering of an item has been changed in the revision of a part of ISO 31, the number in the
preceding edition is shown in parenthesis under the new number for the quantity; a dash is used to indicate that
the item in question did not appear in the preceding edition.
0.2 Tables of quantities
The names in English and in French of the most important quantities within the field of this document are given
together with their symbols and, in most cases, their definitions. These names and symbols are
recommendations. The definitions are given for identification of the quantities in the International System of
Quantities (ISQ), listed in the tables; they are not intended to be complete.
The scalar, vectorial or tensorial character of quantities is pointed out, especially when this is needed for the
definitions.
In most cases, only one name and only one symbol for the quantity are given; where two or more names or two
or more symbols are given for one quantity and no special distinction is made, they are on an equal footing.
ϑ θ ϕ φ a g
When two types of italic letters exist (for example as with and ; and ; a and ; g and ), only one of these
is given. This does not mean that the other is not equally acceptable. It is recommended that such variants
should not be given different meanings. A symbol within parenthesis implies that it is a reserve symbol, to be
used when, in a particular context, the main symbol is in use with a different meaning.
In this English edition, the quantity names in French are printed in an italic font, and are preceded by fr. The
gender of the French name is indicated by (m) for masculine and (f) for feminine, immediately after the noun in
the French name.
0.3 Remark on units for quantities of dimension one, or dimensionless quantities
The coherent unit for any quantity of dimension one, also called a dimensionless quantity, is the number one,
symbol 1. When the value of such a quantity is expressed, the unit symbol 1 is generally not written out
explicitly.
EXAMPLE 1 Refractive index n = 1,53× 1 = 1,53
Prefixes shall not be used to form multiples or submultiples of this unit. Instead of prefixes, powers of 10 are
recommended.
3
EXAMPLE 2 Reynolds number Re = 1,32× 10
Considering that plane angle is generally expressed as the ratio of two lengths and solid angle as the ratio o
...