Please answer the following: 1. Name of conference 2. Type of Presentation Contributed: Lecture form or Poster form Minisymposium: 3. Equipment for Visual Support Lecture form/Minisymposium: Overhead Projector or 2" x 2" Slide Projector (35mm) Poster form: Easel or Poster Board 4. If you are a speaker in a minisymposium, who is the organizer? 5. What is the minisymposium title? 6. If more than one author, who will present the paper? %This is a macro file for creating a SIAM Conference abstract in % Plain Tex. % % If you have any questions regarding these macros contact: % Lillian Hunt % SIAM % 3600 University City Center Center % Philadelphia, PA 19104-2688 % USA % (215) 382-9800 % e-mail:meetings@siam.org \hsize=25.5pc \vsize=50pc \parskip=3pt \parindent=0pt \overfullrule=0pt \nopagenumbers \def\title#1\\{\bf{#1}\vskip6pt} \def\abstract#1\\{\rm {#1}} \def\author#1\\{\vskip6pt\rm {#1}\vfill\eject} \def\eol{\hfill\break} % end of style file % This is ptexconf.tex. Use this file as an example of a SIAM % Conference abstract in plain TeX. \input ptexconf.sty \title Numerical Analysis of a 1-Dimensional Immersed-Boundary Method\\ \abstract We present the numerical analysis of a simplified, one-dimensional version of Peskin's immersed boundary method, which has been used to solve the two- and three-dimensional Navier-Stokes equations in the presence of immersed boundaries. We consider the heat equation in a finite domain with a moving source term. We denote the solution as $u(x,t)$ and the location of the source term as $X(t)$. The source term is a moving delta function whose strength is a function of u at the location of the delta function. The p.d.e. is coupled to an ordinary differential equation whose solution gives the location of the source term. The o.d.e. is $X'(t) = u(X(t),t)$, which can be interpreted as saying the source term moves at the local velocity. The accuracy the numerical method of solution depends on how the delta function is discretized when the delta function is not at a grid point and on how the solution, u, is represented at locations between grid points. We present results showing the effect of different choices of spreading the source to the grid and of restricting the solution to the source location. The problem we analyze is also similar to the Stefan problem and the immersed-boundary method has features in common with particle-in-cell methods.\\ \author\underbar{Richard P. Beyer, Jr.}\eol University of Washington, Seattle, WA\eol %\vskip3pt Randall J. LeVeque\eol University of Washington, Seattle, WA\\ \bye % end of example file Please furnish complete addresses for all co-authors. PLEASE BE SURE TO INDICATE WHAT CONFERENCE THE ABSTRACT IS FOR.