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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Mechanical and Aerospace Engineering 70 375 171 149 30405

Philip Geoffrey Saffman publications per year

The chart shows the history of publications by Philip Geoffrey Saffman between 1956 and 2018, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Philip Geoffrey Saffman published across 63 years, from 1956 to 2018, averaging 2.9 papers a year. Output peaked at 19 publications in 1993. 1 of the 185 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1956 to 2018. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 1993. 1956: 3 publications 1957: 0 publications 1958: 1 publication 1959: 4 publications 1960: 3 publications 1961: 3 publications 1962: 3 publications 1963: 3 publications 1964: 2 publications 1965: 1 publication 1966: 2 publications 1967: 7 publications 1968: 3 publications 1969: 3 publications 1970: 6 publications 1971: 5 publications 1972: 2 publications 1973: 3 publications 1974: 5 publications 1975: 5 publications 1976: 3 publications 1977: 3 publications 1978: 7 publications 1979: 4 publications 1980: 7 publications 1981: 8 publications 1982: 10 publications 1983: 2 publications 1984: 6 publications 1985: 7 publications 1986: 6 publications 1987: 3 publications 1988: 5 publications 1989: 3 publications 1990: 4 publications 1991: 8 publications 1992: 2 publications 1993: 19 publications 1994: 3 publications 1995: 2 publications 1996: 3 publications 1997: 2 publications 1998: 1 publication 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 1 publication 2003: 0 publications 2004: 0 publications 2005: 0 publications 2006: 0 publications 2007: 1 publication 2008: 0 publications 2009: 0 publications 2010: 0 publications 2011: 0 publications 2012: 0 publications 2013: 0 publications 2014: 0 publications 2015: 0 publications 2016: 0 publications 2017: 0 publications 2018: 1 publication
1956 2018

185 publications in total across all disciplines

View publications per year as a table
Philip Geoffrey Saffman: publications per year, 1956 to 2018
Year Publications
1956 3
1957 0
1958 1
1959 4
1960 3
1961 3
1962 3
1963 3
1964 2
1965 1
1966 2
1967 7
1968 3
1969 3
1970 6
1971 5
1972 2
1973 3
1974 5
1975 5
1976 3
1977 3
1978 7
1979 4
1980 7
1981 8
1982 10
1983 2
1984 6
1985 7
1986 6
1987 3
1988 5
1989 3
1990 4
1991 8
1992 2
1993 19
1994 3
1995 2
1996 3
1997 2
1998 1
1999 0
2000 0
2001 0
2002 1
2003 0
2004 0
2005 0
2006 0
2007 1
2008 0
2009 0
2010 0
2011 0
2012 0
2013 0
2014 0
2015 0
2016 0
2017 0
2018 1
Total 185
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Philip Geoffrey Saffman publications per year - data summary

  • Philip Geoffrey Saffman, a Mechanical and Aerospace Engineering scholar from California Institute of Technology, has 185 publications recorded across 63 years, from 1956 to 2018.
  • The oldest publication on record dates to 1956 and the most recent to 2018.
  • The most productive year is 1993, with 19 publications.
  • The least productive years with any output are 1958, 1965, 1998, 2002 and others, with 1 publication each.
  • 18 of the 63 years in the span carry no publications at all (1957, 1999, 2000, 2001 and others).
  • The rate of publication averages 2.9 papers per year over the whole span, or 4.1 per year counting only the 45 years with at least one publication.
  • The last 5 years on the chart (2014-2018) hold 1 publication, <1% of the career total.
  • Split into equal eras - 1956-1976: 67 publications (3.2 per year); 1977-1997: 114 publications (5.4 per year); 1998-2018: 4 publications (0.2 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

Philip Geoffrey Saffman publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Philip Geoffrey Saffman sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 63 bars. Horizontal axis: publications, 47–56 to 659+. Vertical axis: number of scientists, 0 to 155. Most scientists, 155, have 147–156 publications. The last bar groups every scientist with 659 publications or more. The highlighted bar, 147–156 publications, is where this scientist sits. 47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47–56 publications 659+

This scientist: 149 publications — 24th percentile

24% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

View publications distribution as a table
Number of Mechanical and Aerospace Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
Publications Scientists This scientist
47–56 10
57–66 23
67–76 32
77–86 62
87–96 67
97–106 91
107–116 113
117–126 115
127–136 130
137–146 140
147–156 155 149
157–166 132
167–176 133
177–186 130
187–196 140
197–206 115
207–216 125
217–226 117
227–236 99
237–246 92
247–256 100
257–266 95
267–276 88
277–286 77
287–296 74
297–306 74
307–316 62
317–326 70
327–336 59
337–346 58
347–356 45
357–366 44
367–376 36
377–386 41
387–396 32
397–406 23
407–416 28
417–426 27
427–436 25
437–446 23
447–456 23
457–466 20
467–476 12
477–486 24
487–496 18
497–506 12
507–516 13
517–526 21
527–536 12
537–546 8
547–556 16
557–566 3
567–576 11
577–586 6
587–596 5
597–606 6
607–616 7
617–626 7
627–636 10
637–646 4
647–656 3
657–658 2
659+ 100
Download as CSV

Philip Geoffrey Saffman publication distribution in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the publication count of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 63 ranges running from 47–56 to 659+ publications.
  • Philip Geoffrey Saffman, a Mechanical and Aerospace Engineering scholar from California Institute of Technology, records 149 publications - the 24th percentile of the discipline.
  • 24% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Philip Geoffrey Saffman, and about 76% score higher.
  • The median of the discipline falls in the 217–226 publications range, and Philip Geoffrey Saffman ranks below the median.
  • The most crowded range is 147–156 publications, holding 155 scientists (4% of the field).
  • 46% of the field sits in the lowest quarter of the value range (up to 197–206 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 659 publications or more, 100 scientists in all (3% of the field).

Philip Geoffrey Saffman D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Philip Geoffrey Saffman sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 64 bars. Horizontal axis: D-Index, 30 to 93+. Vertical axis: number of scientists, 0 to 189. Most scientists, 189, have 34 D-Index. The last bar groups every scientist with 93 D-Index or more. The highlighted bar, 70 D-Index, is where this scientist sits. 30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 70 D-Index — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 93 D-Index or more.

View D-Index distribution as a table
Number of Mechanical and Aerospace Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
D-Index Scientists This scientist
30 83
31 113
32 144
33 153
34 189
35 158
36 139
37 127
38 130
39 126
40 104
41 100
42 107
43 101
44 103
45 79
46 88
47 70
48 83
49 44
50 64
51 56
52 50
53 48
54 58
55 52
56 48
57 42
58 34
59 42
60 37
61 42
62 44
63 22
64 33
65 29
66 23
67 29
68 24
69 19
70 34 70
71 26
72 19
73 18
74 19
75 14
76 19
77 8
78 18
79 16
80 12
81 17
82 11
83 16
84 7
85 9
86 8
87 6
88 6
89 7
90 10
91 4
92 4
93+ 100
Download as CSV

Philip Geoffrey Saffman D-index placement in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 64 ranges running from 30 to 93+ D-Index.
  • Philip Geoffrey Saffman, a Mechanical and Aerospace Engineering scholar from California Institute of Technology, records 70 D-Index - the 89th percentile of the discipline.
  • 89% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Philip Geoffrey Saffman, and about 11% score higher.
  • The median of the discipline falls in the 43 D-Index range, and Philip Geoffrey Saffman ranks above the median.
  • The most crowded range is 34 D-Index, holding 189 scientists (5% of the field).
  • 57% of the field sits in the lowest quarter of the value range (up to 45 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 93 D-Index or more, 100 scientists in all (3% of the field).

Overview

Philip Geoffrey Saffman was affiliated with the California Institute of Technology in the United States. Their academic contributions and research career are noted without specific publication records or listed topics publicly available in this profile.

While no detailed records of recent papers, frequent co-authors, or publication venues have been provided, Saffman's association with a prominent research institution like Caltech indicates an involvement in advanced scientific inquiry during their career.

No explicit information on main fields of study, subfields, or primary research topics has been supplied, which limits the ability to detail the specific academic domains or thematic focuses that characterized their work.

Similarly, there are no details about book publications or awards attributed to Saffman within the provided data, thus no such accomplishments can be enumerated or described.

The scientist is deceased, which frames the overview of their career in past terms, reflecting on contributions that are archival or historical from the current perspective.

Best Publications

  • The lift on a small sphere in a slow shear flow

    P. G. Saffman

  • The Penetration of a Fluid into a Porous Medium or Hele-Shaw Cell Containing a More Viscous Liquid

    Philip Geoffrey Saffman;Geoffrey Ingram Taylor

  • Brownian motion in biological membranes

    P G Saffman;M Delbrück

  • On the collision of drops in turbulent clouds

    P. G. Saffman;J. S. Turner

  • On the Boundary Condition at the Surface of a Porous Medium

    Unknown

  • The structure of intense vorticity in isotropic turbulence

    Javier Jiménez;Alan A. Wray;Philip G. Saffman;Robert S. Rogallo

  • On the stability of laminar flow of a dusty gas

    Unknown

  • A theory of dispersion in a porous medium

    P. G. Saffman

  • Brownian motion in thin sheets of viscous fluid

    P. G. Saffman

  • The large-scale structure of homogeneous turbulence

    P. G. Saffman

  • Viscous fingering in Hele-Shaw cells

    P. G. Saffman

  • The motion of a vortex filament with axial flow

    Derek William Moore;Philip Geoffrey Saffman

  • The Velocity of Viscous Vortex Rings

    P. G. Saffman

  • The instability of a straight vortex filament in a strain field

    Derek William Moore;Philip Geoffrey Saffman

  • A model for inhomogeneous turbulent flow

    Philip Geoffrey Saffman

  • On the rise of small air bubbles in water

    P. G. Saffman

  • A NOTE ON THE MOTION OF BUBBLES IN A HELE-SHAW CELL AND POROUS MEDIUM

    Geoffrey Taylor;P. G. Saffman

  • Nonlinear Interactions of Random Waves in a Dispersive Medium

    D. J. Benney;Philip Geoffrey Saffman

  • On the Spectrum and Decay of Random Two-Dimensional Vorticity Distributions at Large Reynolds Number

    P. G. Saffman

  • THE PENETRATION OF A FINGER INTO A VISCOUS FLUID IN A CHANNEL AND TUBE

    Unknown

  • Axial Flow in Laminar Trailing Vortices

    Derek William Moore;Philip Geoffrey Saffman

  • The density of organized vortices in a turbulent mixing layer

    D. W. Moore;P. G. Saffman

  • On the motion of small spheroidal particles in a viscous liquid

    P. G. Saffman

Frequent Co-Authors

Doyle Knight
Doyle Knight Rutgers, The State University of New Jersey
Javier Jiménez
Javier Jiménez Technical University of Madrid
Geoffrey Ingram Taylor
Geoffrey Ingram Taylor University of Cambridge
Bengt Fornberg
Bengt Fornberg University of Colorado Boulder
Robert S. MacKay
Robert S. MacKay University of Warwick
D. I. Pullin
D. I. Pullin California Institute of Technology
Tony Maxworthy
Tony Maxworthy University of Southern California

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