D J Im

Publications (2)4.56 Total impact

• Article: Deformation and motion of a charged conducting drop in a dielectric liquid under a nonuniform electric field.

  J G Kim, D J Im, Y M Jung, I S Kang
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  ABSTRACT: As a tool for transporting a drop inside another fluid, a charged conducting drop driven by Coulombic force is considered. Specifically, deformation and motion of a charged conducting drop under nonuniform electric fields are studied using the perturbation method. For simplicity in analysis, the applied electric field is assumed to be expressed as the sum of a uniform field and a linear field and the flow is assumed to be in the Stokes flow range. The deformed drop shape due to electrical stress is computed to the first order of the electrical Weber number (W). Then the electric force and the hydrodynamic drag are computed to derive the formula of the translation velocity, which is valid up to O(W). Several important results have also been obtained for the effect of drop deformation on the electric and hydrodynamic forces exerted on the drop.
  Journal of Colloid and Interface Science 07/2007; 310(2):599-606. · 3.07 Impact Factor
• Article: Juvenile chronic myelogenous leukemia, neurofibromatosis 1, and xanthoma.

  K A Jang, J H Choi, K J Sung, K C Moon, J K Koh, D J Im
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  ABSTRACT: The triple association of leukemia, xanthomatous skin lesions, and neurofibromatosis 1 (NF) was first described by Royer et al. in 1958. Most of the leukemias were of the juvenile chronic myelogenous type (JCML). We describe a 7-year-old male child with xanthoma, neurofibromatosis 1, and juvenile chronic myelogenous leukemia. His mother also had NF1. We suggest that the presence of xanthomas and NF1 in a young child should raise awareness of the possible development of JCML, especially in patients with a family history of NF1.
  The Journal of Dermatology 02/1999; 26(1):33-5. · 1.49 Impact Factor