Turbulence Chapter 5: Scale-Resolving Simulations (SRS)
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 5: Scale-Resolving Simulations (SRS)

This chapter covers Scale-Resolving Simulation (SRS) methods, which aim to resolve the large turbulent structures in a flow while modeling the smaller ones. The summary includes classical LES, wall-modeled and embedded LES, hybrid models like DES and SBES, and scale-adaptive approaches such as SAS. Application notes and model selection guidelines are also included.

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Turbulence Chapter 4: Laminar-turbulent Transition Modeling
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 4: Laminar-turbulent Transition Modeling

This chapter focuses on the modeling of laminar–turbulent transition in RANS simulations. The transition region affects boundary layer behavior, drag, and heat transfer, and cannot be captured by fully turbulent models. Different transition mechanisms are introduced, followed by an overview of modern transition models based on intermittency, laminar kinetic energy, and empirical correlations. The summary includes Fluent-specific implementations and practical considerations for setup and mesh requirements.

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Turbulence Chapter 3: Near-Wall Modeling
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 3: Near-Wall Modeling

In this chapter, we journey into the turbulent zone right next to the wall — where sharp gradients, subtle balances, and small-scale chaos control the drag, heat transfer, and flow separation that engineers care about. We explore how near-wall turbulence is structured, how CFD models like wall functions or enhanced wall treatments handle it, and why roughness and mesh strategy matter more than you might expect. This is where the wall stops being just a boundary and becomes the real battleground of turbulence.

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IBM Data Engineering: Python
Kamil Pospiech Kamil Pospiech

IBM Data Engineering: Python

Structured course notes from IBM’s Python for Data Science and AI. Includes syntax basics, functions, pandas, NumPy, file I/O, REST APIs, and web scraping. Focus on practical reference and tools for real-world data projects.

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IBM Data Engineering: Introduction
Kamil Pospiech Kamil Pospiech

IBM Data Engineering: Introduction

A practical, high-level walkthrough of modern data engineering: tools, architecture, pipelines, wrangling, security, governance, and real-world practices. Based on the IBM Introduction to Data Engineering course, this post distills key lessons for both beginners and transitioning professionals.

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Turbulence Chapter 2: Turbulence Anisotropy in RANS
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 2: Turbulence Anisotropy in RANS

Reynolds-Stress Models (RSM) aim to capture the directional complexity of turbulence where simpler models fail. This post breaks down the theory behind RSM, explains when and why it’s needed, and offers intuitive analogies and stability tips — all framed through the Socratic questions we use throughout the course.

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Turbulence Chapter 1: Review of RANS-Boussinesq Models & Statistical Turbulence Description
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 1: Review of RANS-Boussinesq Models & Statistical Turbulence Description

Turbulence modeling is at the core of modern Computational Fluid Dynamics (CFD), bridging the gap between theoretical fluid mechanics and practical engineering applications. This guide explores the fundamentals of turbulence, from the Reynolds-Averaged Navier-Stokes (RANS) approach and the Boussinesq hypothesis to improved RANS models like Realizable k-ε, RNG k-ε, and curvature-corrected models. With a focus on practical CFD applications, we delve into turbulence production limiters, near-wall treatments, and Fluent best practices. This structured study consolidates critical turbulence modeling concepts, equipping CFD engineers with the knowledge to select and implement the most suitable models for their simulations.

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Exploring SQL: Building a Foundation in Data
Kamil Pospiech Kamil Pospiech

Exploring SQL: Building a Foundation in Data

Structured Query Language (SQL) is an essential tool for any data-driven project. In this post, I share my experience with the SQL course by Luke Barousse, covering everything from basic queries to advanced concepts like CTEs and subqueries. I also explain how I plan to apply these new skills in real-world SQL projects at work.

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Kaggle Playground series s5e1: Tough Beginnings
Kamil Pospiech Kamil Pospiech

Kaggle Playground series s5e1: Tough Beginnings

This blog post covers my first attempt at a Kaggle competition, where I explored data, engineered features, and trained models to predict sticker sales. Despite ranking around 1500th, I learned valuable lessons and discovered top competitor strategies that I'll dive into next.

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