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Preface: Computational Modeling in BiomechanicsBiomechanics involves the study of the interactions of physical forces and deformations with biology. With an increasing appreciation of the complexity of biological molecules, cells, tissues, and organisms, this field has undergone an exciting period of rapid growth and advancement in the past two decades, with the introduction of a number of new engineering and biological technologies. In particular, the ability to develop and analyze new computational biomechanical models is progressing rapidly, with unprecedented capabilities to analyze complex geometries, constitutive models, or biological activity. New modeling approaches are being developed that can seamlessly integrate multiple disciplines, such as imaging with biomechanics, chemical reactions with fluid dynamics, or tissue growth with mathematical modeling. Similarly, significant progress is being made in developing complex models that incorporate multiple phases to describe cells and tissues, high temporal and spatial resolutions, and constitutive models that can incorporate nonlinearity, viscoelasticity, and anisotropy. Finally, rapid advances in computational power has opened up the possibility to model biomechanical phenomena at the molecular level using ab initio quantum mechanical and other atomistic tools while efficient scale linking strategies allow the investigation of biomechanical systems at extraordinary resolution with reasonable computational complexity.In this text, we present a number of recent studies focusing on a variety of different aspects of computational modeling in biomechanics, ranging from the development of new computational methods to the application of such methods to study different biological questions. The chapters in this text are organized by their general relevance to different physiological systems, such as the cardiovascular or musculoskeletal systems. However, it is important to note that such studies cover a wide range of geometric scales, ranging from studies at the molecular level, to the cell membrane and to single cells, up to the tissue, organ and system levels.Section 1 focuses on biofluids and mass transfer, highlighting models of transport in the vascular and intestinal systems. Emerging computational techniques such as the lattice-Boltzmann method and the immersed boundary method provide exciting alternatives to traditional techniques in fluid mechanics and fluid-structure interaction computations, respectively. Section 2 presents computat...