[
    {
        "id": "authors:4k1qj-zdj58",
        "collection": "authors",
        "collection_id": "4k1qj-zdj58",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130502-133421110",
        "type": "article",
        "title": "Hans W. Liepmann, 1914-2009",
        "author": [
            {
                "family_name": "Narasimha",
                "given_name": "Roddam",
                "clpid": "Narasimha-R"
            },
            {
                "family_name": "Roshko",
                "given_name": "Anatol",
                "clpid": "Roshko-A"
            },
            {
                "family_name": "Gharib",
                "given_name": "Morteza",
                "orcid": "0000-0003-0754-4193",
                "clpid": "Gharib-M"
            }
        ],
        "abstract": "This article presents a brief account of the life and work of Hans W.\nLiepmann, a distinguished fluid dynamicist, an outstanding teacher and\nleader, and the third Director of the Graduate Aeronautical Laboratories,\nCalifornia Institute of Technology.",
        "doi": "10.1146/annurev-fluid-120710-101108",
        "issn": "0066-4189",
        "publisher": "Annual Reviews",
        "publication": "Annual Review of Fluid Mechanics",
        "publication_date": "2013-01",
        "volume": "45",
        "pages": "1-17"
    },
    {
        "id": "authors:x3dw2-keh41",
        "collection": "authors",
        "collection_id": "x3dw2-keh41",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20150402-092452262",
        "type": "article",
        "title": "Laboratory simulations show diabatic heating drives cumulus-cloud evolution and entrainment",
        "author": [
            {
                "family_name": "Narasimha",
                "given_name": "Roddam",
                "clpid": "Narasimha-R"
            },
            {
                "family_name": "Diwan",
                "given_name": "Sourabh Suhas",
                "clpid": "Diwan-S-S"
            },
            {
                "family_name": "Duvvuri",
                "given_name": "Subrahmanyam",
                "orcid": "0000-0001-8082-1658",
                "clpid": "Duvvuri-S"
            },
            {
                "family_name": "Sreenivasan",
                "given_name": "K. R.",
                "clpid": "Sreenivasan-K-R"
            },
            {
                "family_name": "Bhat",
                "given_name": "G. S.",
                "clpid": "Bhat-G-S"
            }
        ],
        "abstract": "Clouds are the largest source of uncertainty in climate science, and remain a weak link in modeling tropical circulation. A major challenge is to establish connections between particulate microphysics and macroscale turbulent dynamics in cumulus clouds. Here we address the issue from the latter standpoint. First we show how to create bench-scale flows that reproduce a variety of cumulus-cloud forms (including two genera and three species), and track complete cloud life cycles\u2014e.g., from a \"cauliflower\" congestus to a dissipating fractus. The flow model used is a transient plume with volumetric diabatic heating scaled dynamically to simulate latent-heat release from phase changes in clouds. Laser-based diagnostics of steady plumes reveal Riehl\u2013Malkus type protected cores. They also show that, unlike the constancy implied by early self-similar plume models, the diabatic heating raises the Taylor entrainment coefficient just above cloud base, depressing it at higher levels. This behavior is consistent with cloud-dilution rates found in recent numerical simulations of steady deep convection, and with aircraft-based observations of homogeneous mixing in clouds. In-cloud diabatic heating thus emerges as the key driver in cloud development, and could well provide a major link between microphysics and cloud-scale dynamics.",
        "doi": "10.1073/pnas.1112281108",
        "pmcid": "PMC3182732",
        "issn": "0027-8424",
        "publisher": "National Academy of Sciences",
        "publication": "Proceedings of the National Academy of Sciences of the United States of America",
        "publication_date": "2011-09-27",
        "series_number": "39",
        "volume": "108",
        "issue": "39",
        "pages": "16164-16169"
    },
    {
        "id": "authors:8mw6j-sed92",
        "collection": "authors",
        "collection_id": "8mw6j-sed92",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:NARpof60",
        "type": "article",
        "title": "Nearly free molecular flow through an orifice",
        "author": [
            {
                "family_name": "Narasimha",
                "given_name": "Roddam",
                "clpid": "Narasimha-R"
            }
        ],
        "abstract": "The problem of the flow through an orifice is a very interesting one in fluid mechanics, as it promises to be one of the few configurations which can be investigated over virtually the whole range of possible motions.  For this reason, Liepmann(1) has recently made measurements of the mass flow through an orifice at what are practically infinite pressure rations, through a range of Knudsen numbers covering the transition from continuum to free molecule flow.  The mass flow rate per unit area in the Knudsen limit (i.e., at high K = \u03bb1/R where \u03bb1 is the mean free path at upstream infinity and R is the radius of the hole) is well known from kinetic theory to be m = 1/4p1c1 where p1 is the density and c1 the mean molecular speed at upstream infinity.  The purpose of this note is to estimate the effect on m of a Knudsen number K that is not so large.",
        "doi": "10.1063/1.1706063",
        "issn": "0031-9171",
        "publisher": "Physics of Fluids",
        "publication": "Physics of Fluids",
        "publication_date": "1960-05-01",
        "series_number": "3",
        "volume": "3",
        "issue": "3",
        "pages": "476-477"
    }
]