🔊 COMSOL Tutorial: Sound Transmission Loss of a Muffler with Mean Flow 🚗 скачать в хорошем качестве

🔊 COMSOL Tutorial: Sound Transmission Loss of a Muffler with Mean Flow 🚗

🌐 Explore More: 🔗 https://arminhashemi.org/ 🛠️ Need Help with a Project? 📩 https://arminhashemi.org/order-project/ 📸 Follow Me on Instagram:   / caewitharminhashemi   💼 Connect on LinkedIn:   / cae-with-armin   🔊 COMSOL Tutorial: Sound Transmission Loss of a Muffler with Mean Flow 🚗💨 In this video, I explain how to calculate the sound transmission loss of a muffler with mean flow using COMSOL Multiphysics. The simulation uses the Linearized Navier-Stokes, Frequency Domain physics, along with Fluid Flow, Stationary, and Mapped Mesh interfaces. To accurately capture the interaction between flow and acoustics, we need to run three separate studies: 1. Fluid Flow (Stationary) – to solve for the mean flow 2. Mapping Mesh – to map the solution between interfaces 3. Linearized Navier-Stokes (Frequency Domain) – to compute the acoustic response Finally, I will compare results with Pressure acoustics physics 💡 What You’ll Learn: ✅ How to simulate acoustic wave propagation with mean flow ✅ Setting up linearized acoustic analysis ✅ Using mapped mesh for interface coupling ✅ Extracting transmission loss from the results 📥 Download COMSOL Model: https://www.dropbox.com/s/o14n8mweh4e... 👍 Like the video, 🔔 subscribe for more COMSOL and simulation tutorials! The variables and formula variables k0 lnsf.omega/(lnsf.c0+Uin) "Convected wave number" pb 1[Pa]*exp(-i*k0*x) "Background acoustic pressure" ub -1/(lnsf.iomega*lnsf.rho0)*d(pb,x) "Background acoustic x-velocity" vb 0 "Background acoustic y-velocity" wb 0 "Background acoustic z-velocity" Tb lnsf.alpha_p*lnsf.T0/(lnsf.rho0*lnsf.Cp)*pb "Background acoustic temperature" Transmission loss formula 20*log10(abs(intop_in(pb)/intop_out(lnsf.p_t))) 0:00 1:09 Introduction 1:10 2:24 Pressure Acoustic 2:25 5:22 Fluid Flow 5:23 7:40 Geometry Preparation 7:41 9:32 Defining PML 9:33 12:32 Linearized Navier-Stokes 12:33 14:23 Study for Linearized Navier-Stokes 14:24 15:55 Results 15:56 Finer mesh #comsoltutorial #comsol #cfd #comsolacoustic #CAEwithArmin