{"id":302220,"date":"2024-10-19T20:38:40","date_gmt":"2024-10-19T20:38:40","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-20998-22013\/"},"modified":"2024-10-25T18:09:13","modified_gmt":"2024-10-25T18:09:13","slug":"bs-iso-20998-22013","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-20998-22013\/","title":{"rendered":"BS ISO 20998-2:2013"},"content":{"rendered":"

This part of ISO 20998 describes ultrasonic attenuation spectroscopy methods for determining the size distributions of a particulate phase dispersed in a liquid at dilute concentrations, where the ultrasonic attenuation spectrum is a linear function of the particle volume fraction. In this regime, particle\u2013particle interactions are negligible. Colloids, dilute dispersions, and emulsions are within the scope of this part of ISO 20998. The typical particle size for such analysis ranges from 10 nm to 3 mm, although particles outside this range have also been successfully measured. For solid particles in suspension, size measurements can be made at concentrations typically ranging from 0,1 % volume fraction up to 5 % volume fraction, depending on the density contrast between the solid and liquid phases, the particle size, and the frequency range.<\/p>\n

\n

NOTE See References [9][10].<\/p>\n<\/blockquote>\n

For emulsions, measurements may be made at much higher concentrations. These ultrasonic methods can be used to monitor dynamic changes in the size distribution.<\/p>\n

While it is possible to determine the particle size distribution from either the attenuation spectrum or the phase velocity spectrum, the use of attenuation data alone is recommended. The relative variation in phase velocity due to changing particle size is small compared to the mean velocity, so it is often difficult to determine the phase velocity with a high degree of accuracy, particularly at ambient temperature. Likewise, the combined use of attenuation and velocity spectra to determine the particle size is not recommended. The presence of measurement errors (i.e. \u201cnoise\u201d) in the magnitude and phase spectra can increase the ill-posed nature of the problem and reduce the stability of the inversion.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\nSection sec_1
Section sec_2
Section sec_3
Section sec_3.1
1\tScope
2\tNormative references
3\tTerms and definitions <\/td>\n<\/tr>\n
10<\/td>\nSection sec_3.2
Section sec_3.3
Section sec_3.4
Section sec_4
4\tSymbols and abbreviated terms <\/td>\n<\/tr>\n
12<\/td>\nSection sec_5
Section sec_5.1
Section sec_5.2
5\tMechanism of attenuation (dilute case)
5.1\tIntroduction
5.2\tExcess attenuation coefficient <\/td>\n<\/tr>\n
13<\/td>\nSection sec_5.3
Section sec_5.3.1
Section sec_5.3.2
Section sec_5.3.3
Section sec_5.4
Section sec_5.4.1
5.3\tSpecific attenuation mechanisms
5.4\tLinear models <\/td>\n<\/tr>\n
14<\/td>\nSection sec_5.4.2
Table tab_1 <\/td>\n<\/tr>\n
15<\/td>\nTable tab_2
Section sec_6
Section sec_6.1
6\tDetermination of particle size
6.1\tIntroduction <\/td>\n<\/tr>\n
16<\/td>\nSection sec_6.2
Section sec_6.2.1
Section sec_6.2.2
6.2\tInversion approaches used to determine PSD <\/td>\n<\/tr>\n
17<\/td>\nSection sec_6.3
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.2.1
Section sec_7.2.2
6.3\tLimits of application
7\tInstrument qualification
7.1\tCalibration
7.2\tPrecision <\/td>\n<\/tr>\n
18<\/td>\nSection sec_7.2.3
Section sec_7.3
Section sec_7.3.1
Section sec_7.3.2
Section sec_7.3.3
Section sec_7.3.4
Section sec_7.3.5
7.3\tAccuracy <\/td>\n<\/tr>\n
19<\/td>\nSection sec_8
8\tReporting of results <\/td>\n<\/tr>\n
20<\/td>\nAnnex sec_A
Annex\u00a0A
\n(informative)<\/p>\n

Viscoinertial loss model <\/td>\n<\/tr>\n

21<\/td>\nAnnex sec_B
Annex sec_B.1
Figure fig_B.1
Annex sec_B.2
Annex\u00a0B
\n(informative)<\/p>\n

ECAH theory and limitations <\/td>\n<\/tr>\n

23<\/td>\nAnnex sec_B.3 <\/td>\n<\/tr>\n
24<\/td>\nAnnex sec_C
Annex\u00a0C
\n(informative)<\/p>\n

Example of a semi-empirical model <\/td>\n<\/tr>\n

25<\/td>\nTable tab_c
Figure fig_C.1 <\/td>\n<\/tr>\n
27<\/td>\nAnnex sec_D
Annex\u00a0D
\n(informative)<\/p>\n

Iterative fitting <\/td>\n<\/tr>\n

28<\/td>\nFigure fig_D.1 <\/td>\n<\/tr>\n
29<\/td>\nAnnex sec_E
Table tab_E.1
Table tab_E.2
Table tab_E.3
Annex\u00a0E
\n(informative)<\/p>\n

Physical parameter values for selected materials <\/td>\n<\/tr>\n

30<\/td>\nAnnex sec_F
Annex sec_F.1
Annex sec_F.2
Table tab_d
Figure fig_.1
Annex\u00a0F
\n(informative)<\/p>\n

Practical example of PSD measurement <\/td>\n<\/tr>\n

31<\/td>\nTable tab_F.1
Annex sec_F.3 <\/td>\n<\/tr>\n
32<\/td>\nTable tab_e
Figure fig_.2
Table tab_F.2
Annex sec_F.4 <\/td>\n<\/tr>\n
33<\/td>\nTable tab_F.3 <\/td>\n<\/tr>\n
34<\/td>\nAnnex sec_F.5
Table tab_F.4 <\/td>\n<\/tr>\n
35<\/td>\nAnnex sec_F.6
Table tab_f
Figure fig_.3
Table tab_F.5 <\/td>\n<\/tr>\n
36<\/td>\nTable tab_g
Figure fig_.4
Table tab_F.6 <\/td>\n<\/tr>\n
37<\/td>\nTable tab_h
Figure fig_.5 <\/td>\n<\/tr>\n
38<\/td>\nReference ref_1
Reference ref_2
Reference ref_3
Reference ref_4
Reference ref_5
Reference ref_6
Reference ref_7
Reference ref_8
Reference ref_9
Reference ref_10
Reference ref_11
Reference ref_12
Reference ref_13
Reference ref_14
Reference ref_15
Reference ref_16
Reference ref_17
Reference ref_18
Reference ref_19
Reference ref_20
Reference ref_21
Bibliography <\/td>\n<\/tr>\n
39<\/td>\nReference ref_22
Reference ref_23
Reference ref_24
Reference ref_25
Reference ref_26
Reference ref_27
Reference ref_28
Reference ref_29
Reference ref_30
Reference ref_31
Reference ref_32
Reference ref_33
Reference ref_34 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Measurement and characterization of particles by acoustic methods – Guidelines for linear theory<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2013<\/td>\n42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":302225,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-302220","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/302220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/302225"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=302220"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=302220"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=302220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}